kernel: Remove support for 4.9.x kernels

Signed-off-by: Rolf Neugebauer <rn@rneugeba.io>
2025-07-26 12:07:41 +00:00 · 2020-01-29 20:13:03 +00:00 · 2020-01-29 20:13:03 +00:00 · 4a06b88d1e
commit 4a06b88d1e
parent f06c39545a
24 changed files with 0 additions and 7566 deletions
--- a/kernel/Makefile
+++ b/kernel/Makefile
@ -258,7 +258,6 @@ $(eval $(call kernel,4.19.90,4.19.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.19.90,4.19.x,,-dbg))
 $(eval $(call kernel,4.19.59,4.19.x,-rt,))
 $(eval $(call kernel,4.14.159,4.14.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.9.206,4.9.x,$(EXTRA),$(DEBUG)))
 else ifeq ($(ARCH),aarch64)
 $(eval $(call kernel,5.4.4,5.4.x,$(EXTRA),$(DEBUG)))
--- a/kernel/config-4.9.x-x86_64
+++ b/kernel/config-4.9.x-x86_64
--- a/kernel/patches-4.9.x/0001-tools-build-Add-test-for-sched_getcpu.patch
+++ b/kernel/patches-4.9.x/0001-tools-build-Add-test-for-sched_getcpu.patch
@ -1,150 +0,0 @@
 From 564a87a65b31d2ca32417d0bd2f47aa6ba3d423a Mon Sep 17 00:00:00 2001
 From: Arnaldo Carvalho de Melo <acme@redhat.com>
 Date: Thu, 2 Mar 2017 12:55:49 -0300
 Subject: [PATCH 01/14] tools build: Add test for sched_getcpu()
 Instead of trying to go on adding more ifdef conditions, do a feature
 test and define HAVE_SCHED_GETCPU_SUPPORT instead, then use it to
 provide the prototype. No need to change the stub, as it is already a
 __weak symbol.
 Cc: Adrian Hunter <adrian.hunter@intel.com>
 Cc: David Ahern <dsahern@gmail.com>
 Cc: Jiri Olsa <jolsa@kernel.org>
 Cc: Namhyung Kim <namhyung@kernel.org>
 Cc: Wang Nan <wangnan0@huawei.com>
 Link: http://lkml.kernel.org/n/tip-yge89er9g90sc0v6k0a0r5tr@git.kernel.org
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 (cherry picked from commit 120010cb1eea151d38a3e66f5ffc79a0c3110292)
 Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
 ---
 tools/build/Makefile.feature            | 1 +
 tools/build/feature/Makefile            | 6 +++++-
 tools/build/feature/test-all.c          | 5 +++++
 tools/build/feature/test-sched_getcpu.c | 7 +++++++
 tools/perf/Makefile.config              | 4 ++++
 tools/perf/util/cloexec.h               | 6 ------
 tools/perf/util/util.h                  | 4 ++--
 7 files changed, 24 insertions(+), 9 deletions(-)
 create mode 100644 tools/build/feature/test-sched_getcpu.c
 diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
 index ae52e029dd22..ea0a46b4f65f 100644
 --- a/tools/build/Makefile.feature
 +++ b/tools/build/Makefile.feature
@@ -63,6 +63,7 @@ FEATURE_TESTS_BASIC :=			\
 	lzma				\
 	get_cpuid			\
 	bpf				\
 +        sched_getcpu			\
 	sdt
 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
 diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
 index ac9c477a2a48..5d5f093b85a1 100644
 --- a/tools/build/feature/Makefile
 +++ b/tools/build/feature/Makefile
@@ -47,7 +47,8 @@ FILES=					\
 	test-bpf.bin			\
 	test-get_cpuid.bin		\
 	test-sdt.bin			\
 -	test-cxx.bin
 +	test-cxx.bin			\
 +        test-sched_getcpu.bin
 FILES := $(addprefix $(OUTPUT),$(FILES))
@@ -89,6 +90,9 @@ $(OUTPUT)test-libelf.bin:
 $(OUTPUT)test-glibc.bin:
 	$(BUILD)
 +$(OUTPUT)test-sched_getcpu.bin:
 +	$(BUILD)
 +
 DWARFLIBS := -ldw
 ifeq ($(findstring -static,${LDFLAGS}),-static)
 DWARFLIBS += -lelf -lebl -lz -llzma -lbz2
 diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
 index 699e43627397..cc6c7c01f4ca 100644
 --- a/tools/build/feature/test-all.c
 +++ b/tools/build/feature/test-all.c
@@ -117,6 +117,10 @@
 # include "test-pthread-attr-setaffinity-np.c"
 #undef main
 +#define main main_test_sched_getcpu
 +# include "test-sched_getcpu.c"
 +#undef main
 +
 # if 0
 /*
  * Disable libbabeltrace check for test-all, because the requested
@@ -182,6 +186,7 @@ int main(int argc, char *argv[])
 	main_test_get_cpuid();
 	main_test_bpf();
 	main_test_libcrypto();
 +	main_test_sched_getcpu();
 	main_test_sdt();
 	return 0;
 diff --git a/tools/build/feature/test-sched_getcpu.c b/tools/build/feature/test-sched_getcpu.c
 new file mode 100644
 index 000000000000..c4a148dd7104
 --- /dev/null
 +++ b/tools/build/feature/test-sched_getcpu.c
@@ -0,0 +1,7 @@
 +#define _GNU_SOURCE
 +#include <sched.h>
 +
 +int main(void)
 +{
 +	return sched_getcpu();
 +}
 diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
 index ff375310efe4..07c12686bcd1 100644
 --- a/tools/perf/Makefile.config
 +++ b/tools/perf/Makefile.config
@@ -296,6 +296,10 @@ ifdef NO_DWARF
   NO_LIBDW_DWARF_UNWIND := 1
 endif
 +ifeq ($(feature-sched_getcpu), 1)
 +  CFLAGS += -DHAVE_SCHED_GETCPU_SUPPORT
 +endif
 +
 ifndef NO_LIBELF
   CFLAGS += -DHAVE_LIBELF_SUPPORT
   EXTLIBS += -lelf
 diff --git a/tools/perf/util/cloexec.h b/tools/perf/util/cloexec.h
 index d0d465953d36..94a5a7d829d5 100644
 --- a/tools/perf/util/cloexec.h
 +++ b/tools/perf/util/cloexec.h
@@ -3,10 +3,4 @@
 unsigned long perf_event_open_cloexec_flag(void);
 -#ifdef __GLIBC_PREREQ
 -#if !__GLIBC_PREREQ(2, 6) && !defined(__UCLIBC__)
 -int sched_getcpu(void) __THROW;
 -#endif
 -#endif
 -
 #endif /* __PERF_CLOEXEC_H */
 diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
 index 8b39e8086c2d..d0c7526db145 100644
 --- a/tools/perf/util/util.h
 +++ b/tools/perf/util/util.h
@@ -353,8 +353,8 @@ void print_binary(unsigned char *data, size_t len,
 		  size_t bytes_per_line, print_binary_t printer,
 		  void *extra);
 -#if !defined(__GLIBC__) && !defined(__ANDROID__)
 -extern int sched_getcpu(void);
 +#ifndef HAVE_SCHED_GETCPU_SUPPORT
 +int sched_getcpu(void);
 #endif
 int is_printable_array(char *p, unsigned int len);
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0002-perf-jit-Avoid-returning-garbage-for-a-ret-variable.patch
+++ b/kernel/patches-4.9.x/0002-perf-jit-Avoid-returning-garbage-for-a-ret-variable.patch
@ -1,70 +0,0 @@
 From 3c894cd46a6b7bd5f98e5743715c8bfeb5169992 Mon Sep 17 00:00:00 2001
 From: Arnaldo Carvalho de Melo <acme@redhat.com>
 Date: Thu, 13 Oct 2016 17:12:35 -0300
 Subject: [PATCH 02/14] perf jit: Avoid returning garbage for a ret variable
 When the loop body isn't executed at all, then the 'ret' local variable,
 that is uninitialized will be used as the return value.
 This triggers this error on Alpine Linux:
    CC	   /tmp/build/perf/util/demangle-java.o
    CC	   /tmp/build/perf/util/demangle-rust.o
    CC       /tmp/build/perf/util/jitdump.o
    CC       /tmp/build/perf/util/genelf.o
  util/jitdump.c: In function 'jit_process':
  util/jitdump.c:622:3: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     fprintf(stderr, "injected: %s (%d)\n", path, ret);
     ^
  util/jitdump.c:584:6: note: 'ret' was declared here
    int ret;
        ^
    FLEX     /tmp/build/perf/util/parse-events-flex.c
  / $ gcc -v
  Using built-in specs.
  COLLECT_GCC=gcc
  COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-alpine-linux-musl/5.3.0/lto-wrapper
  Target: x86_64-alpine-linux-musl
  Configured with: /home/buildozer/aports/main/gcc/src/gcc-5.3.0/configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info
  +--build=x86_64-alpine-linux-musl --host=x86_64-alpine-linux-musl --target=x86_64-alpine-linux-musl --with-pkgversion='Alpine 5.3.0' --enable-checking=release
  +--disable-fixed-point --disable-libstdcxx-pch --disable-multilib --disable-nls --disable-werror --disable-symvers --enable-__cxa_atexit --enable-esp
  +--enable-cloog-backend --enable-languages=c,c++,objc,java,fortran,ada --disable-libssp --disable-libmudflap --disable-libsanitizer --enable-shared
  +--enable-threads --enable-tls --with-system-zlib
  Thread model: posix
  gcc version 5.3.0 (Alpine 5.3.0)
 But this so far got under the radar, not causing any build problem, till the
 "perf jit: enable jitdump support without dwarf" gets applied, when the above
 problem takes place, some combination of inlining or whatever, the problem
 is real, so fix it by initializing the variable to zero.
 Cc: Anton Blanchard <anton@ozlabs.org>
 Cc: Jiri Olsa <jolsa@redhat.com>
 Cc: Maciej Debski <maciejd@google.com>
 Cc: Namhyung Kim <namhyung@kernel.org>
 Cc: Peter Zijlstra <peterz@infradead.org>
 Cc: Stephane Eranian <eranian@google.com>
 Link: https://lkml.kernel.org/r/20161013200437.GA12815@kernel.org
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 (cherry picked from commit ef2c3e76d98dfb69a46d870b47656e8e5bac6e2b)
 ---
 tools/perf/util/jitdump.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
 index 7e2e8aa95467..e85918002f13 100644
 --- a/tools/perf/util/jitdump.c
 +++ b/tools/perf/util/jitdump.c
@@ -581,7 +581,7 @@ static int
 jit_process_dump(struct jit_buf_desc *jd)
 {
 	union jr_entry *jr;
 -	int ret;
 +	int ret = 0;
 	while ((jr = jit_get_next_entry(jd))) {
 		switch(jr->prefix.id) {
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0003-hv_sock-introduce-Hyper-V-Sockets.patch
+++ b/kernel/patches-4.9.x/0003-hv_sock-introduce-Hyper-V-Sockets.patch
--- a/kernel/patches-4.9.x/0004-vmbus-Don-t-spam-the-logs-with-unknown-GUIDs.patch
+++ b/kernel/patches-4.9.x/0004-vmbus-Don-t-spam-the-logs-with-unknown-GUIDs.patch
@ -1,30 +0,0 @@
 From 88a3e7768563e2cc69cac3989baf3e3dc8179f0a Mon Sep 17 00:00:00 2001
 From: Rolf Neugebauer <rolf.neugebauer@gmail.com>
 Date: Mon, 23 May 2016 18:55:45 +0100
 Subject: [PATCH 04/14] vmbus: Don't spam the logs with unknown GUIDs
 With Hyper-V sockets device types are introduced on the fly. The pr_info()
 then prints a message on every connection, which is way too verbose.  Since
 there doesn't seem to be an easy way to check for registered services,
 disable the pr_info() completely.
 Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
 ---
 drivers/hv/channel_mgmt.c | 1 -
 1 file changed, 1 deletion(-)
 diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
 index 9360cdce740e..d838074e9add 100644
 --- a/drivers/hv/channel_mgmt.c
 +++ b/drivers/hv/channel_mgmt.c
@@ -192,7 +192,6 @@ static u16 hv_get_dev_type(const struct vmbus_channel *channel)
 		if (!uuid_le_cmp(*guid, vmbus_devs[i].guid))
 			return i;
 	}
 -	pr_info("Unknown GUID: %pUl\n", guid);
 	return i;
 }
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0005-Drivers-hv-utils-Fix-the-mapping-between-host-versio.patch
+++ b/kernel/patches-4.9.x/0005-Drivers-hv-utils-Fix-the-mapping-between-host-versio.patch
@ -1,48 +0,0 @@
 From eeb0dec2777fb87ff9d1c4f8401d876866edaea7 Mon Sep 17 00:00:00 2001
 From: Alex Ng <alexng@messages.microsoft.com>
 Date: Sun, 6 Nov 2016 13:14:07 -0800
 Subject: [PATCH 05/14] Drivers: hv: utils: Fix the mapping between host
 version and protocol to use
 We should intentionally declare the protocols to use for every known host
 and default to using the latest protocol if the host is unknown or new.
 Signed-off-by: Alex Ng <alexng@microsoft.com>
 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
 (cherry picked from commit 3da0401b4d0e17aea7526db0235d98fa535d903e)
 ---
 drivers/hv/hv_util.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
 diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
 index bcd06306f3e8..e7707747f56d 100644
 --- a/drivers/hv/hv_util.c
 +++ b/drivers/hv/hv_util.c
@@ -389,16 +389,19 @@ static int util_probe(struct hv_device *dev,
 		ts_srv_version = TS_VERSION_1;
 		hb_srv_version = HB_VERSION_1;
 		break;
 -	case(VERSION_WIN10):
 +	case VERSION_WIN7:
 +	case VERSION_WIN8:
 +	case VERSION_WIN8_1:
 		util_fw_version = UTIL_FW_VERSION;
 		sd_srv_version = SD_VERSION;
 -		ts_srv_version = TS_VERSION;
 +		ts_srv_version = TS_VERSION_3;
 		hb_srv_version = HB_VERSION;
 		break;
 +	case VERSION_WIN10:
 	default:
 		util_fw_version = UTIL_FW_VERSION;
 		sd_srv_version = SD_VERSION;
 -		ts_srv_version = TS_VERSION_3;
 +		ts_srv_version = TS_VERSION;
 		hb_srv_version = HB_VERSION;
 	}
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0006-Drivers-hv-vss-Improve-log-messages.patch
+++ b/kernel/patches-4.9.x/0006-Drivers-hv-vss-Improve-log-messages.patch
@ -1,105 +0,0 @@
 From a784af34e3903106e3097e7cb43c53f5e26b8e58 Mon Sep 17 00:00:00 2001
 From: Alex Ng <alexng@messages.microsoft.com>
 Date: Sun, 6 Nov 2016 13:14:10 -0800
 Subject: [PATCH 06/14] Drivers: hv: vss: Improve log messages.
 Adding log messages to help troubleshoot error cases and transaction
 handling.
 Signed-off-by: Alex Ng <alexng@microsoft.com>
 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
 (cherry picked from commit 23d2cc0c29eb0e7c6fe4cac88098306c31c40208)
 ---
 drivers/hv/hv_snapshot.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)
 diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
 index a6707133c297..5c95ba1e2ecf 100644
 --- a/drivers/hv/hv_snapshot.c
 +++ b/drivers/hv/hv_snapshot.c
@@ -120,7 +120,7 @@ static int vss_handle_handshake(struct hv_vss_msg *vss_msg)
 	default:
 		return -EINVAL;
 	}
 -	pr_debug("VSS: userspace daemon ver. %d connected\n", dm_reg_value);
 +	pr_info("VSS: userspace daemon ver. %d connected\n", dm_reg_value);
 	return 0;
 }
@@ -128,8 +128,10 @@ static int vss_on_msg(void *msg, int len)
 {
 	struct hv_vss_msg *vss_msg = (struct hv_vss_msg *)msg;
 -	if (len != sizeof(*vss_msg))
 +	if (len != sizeof(*vss_msg)) {
 +		pr_debug("VSS: Message size does not match length\n");
 		return -EINVAL;
 +	}
 	if (vss_msg->vss_hdr.operation == VSS_OP_REGISTER ||
 	    vss_msg->vss_hdr.operation == VSS_OP_REGISTER1) {
@@ -137,8 +139,11 @@ static int vss_on_msg(void *msg, int len)
 		 * Don't process registration messages if we're in the middle
 		 * of a transaction processing.
 		 */
 -		if (vss_transaction.state > HVUTIL_READY)
 +		if (vss_transaction.state > HVUTIL_READY) {
 +			pr_debug("VSS: Got unexpected registration request\n");
 			return -EINVAL;
 +		}
 +
 		return vss_handle_handshake(vss_msg);
 	} else if (vss_transaction.state == HVUTIL_USERSPACE_REQ) {
 		vss_transaction.state = HVUTIL_USERSPACE_RECV;
@@ -155,7 +160,7 @@ static int vss_on_msg(void *msg, int len)
 		}
 	} else {
 		/* This is a spurious call! */
 -		pr_warn("VSS: Transaction not active\n");
 +		pr_debug("VSS: Transaction not active\n");
 		return -EINVAL;
 	}
 	return 0;
@@ -168,8 +173,10 @@ static void vss_send_op(void)
 	struct hv_vss_msg *vss_msg;
 	/* The transaction state is wrong. */
 -	if (vss_transaction.state != HVUTIL_HOSTMSG_RECEIVED)
 +	if (vss_transaction.state != HVUTIL_HOSTMSG_RECEIVED) {
 +		pr_debug("VSS: Unexpected attempt to send to daemon\n");
 		return;
 +	}
 	vss_msg = kzalloc(sizeof(*vss_msg), GFP_KERNEL);
 	if (!vss_msg)
@@ -210,9 +217,13 @@ static void vss_handle_request(struct work_struct *dummy)
 	case VSS_OP_HOT_BACKUP:
 		if (vss_transaction.state < HVUTIL_READY) {
 			/* Userspace is not registered yet */
 +			pr_debug("VSS: Not ready for request.\n");
 			vss_respond_to_host(HV_E_FAIL);
 			return;
 		}
 +
 +		pr_debug("VSS: Received request for op code: %d\n",
 +			vss_transaction.msg->vss_hdr.operation);
 		vss_transaction.state = HVUTIL_HOSTMSG_RECEIVED;
 		vss_send_op();
 		return;
@@ -353,8 +364,10 @@ hv_vss_init(struct hv_util_service *srv)
 	hvt = hvutil_transport_init(vss_devname, CN_VSS_IDX, CN_VSS_VAL,
 				    vss_on_msg, vss_on_reset);
 -	if (!hvt)
 +	if (!hvt) {
 +		pr_warn("VSS: Failed to initialize transport\n");
 		return -EFAULT;
 +	}
 	return 0;
 }
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0007-Drivers-hv-vss-Operation-timeouts-should-match-host-.patch
+++ b/kernel/patches-4.9.x/0007-Drivers-hv-vss-Operation-timeouts-should-match-host-.patch
@ -1,48 +0,0 @@
 From 8f30ce837fd4cc521dfc071ceba5bd0030645f3d Mon Sep 17 00:00:00 2001
 From: Alex Ng <alexng@messages.microsoft.com>
 Date: Sun, 6 Nov 2016 13:14:11 -0800
 Subject: [PATCH 07/14] Drivers: hv: vss: Operation timeouts should match host
 expectation
 Increase the timeout of backup operations. When system is under I/O load,
 it needs more time to freeze. These timeout values should also match the
 host timeout values more closely.
 Signed-off-by: Alex Ng <alexng@microsoft.com>
 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
 (cherry picked from commit b357fd3908c1191f2f56e38aa77f2aecdae18bc8)
 ---
 drivers/hv/hv_snapshot.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
 diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
 index 5c95ba1e2ecf..eee238cc60bd 100644
 --- a/drivers/hv/hv_snapshot.c
 +++ b/drivers/hv/hv_snapshot.c
@@ -31,7 +31,10 @@
 #define VSS_MINOR  0
 #define VSS_VERSION    (VSS_MAJOR << 16 | VSS_MINOR)
 -#define VSS_USERSPACE_TIMEOUT (msecs_to_jiffies(10 * 1000))
 +/*
 + * Timeout values are based on expecations from host
 + */
 +#define VSS_FREEZE_TIMEOUT (15 * 60)
 /*
  * Global state maintained for transaction that is being processed. For a class
@@ -186,7 +189,8 @@ static void vss_send_op(void)
 	vss_transaction.state = HVUTIL_USERSPACE_REQ;
 -	schedule_delayed_work(&vss_timeout_work, VSS_USERSPACE_TIMEOUT);
 +	schedule_delayed_work(&vss_timeout_work, op == VSS_OP_FREEZE ?
 +			VSS_FREEZE_TIMEOUT * HZ : HV_UTIL_TIMEOUT * HZ);
 	rc = hvutil_transport_send(hvt, vss_msg, sizeof(*vss_msg), NULL);
 	if (rc) {
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0008-Drivers-hv-vmbus-Use-all-supported-IC-versions-to-ne.patch
+++ b/kernel/patches-4.9.x/0008-Drivers-hv-vmbus-Use-all-supported-IC-versions-to-ne.patch
@ -1,492 +0,0 @@
 From efb4cdb8f07aec5a3f9d8495b896bb48fbba08e1 Mon Sep 17 00:00:00 2001
 From: Alex Ng <alexng@messages.microsoft.com>
 Date: Sat, 28 Jan 2017 12:37:17 -0700
 Subject: [PATCH 08/14] Drivers: hv: vmbus: Use all supported IC versions to
 negotiate
 Previously, we were assuming that each IC protocol version was tied to a
 specific host version. For example, some Windows 10 preview hosts only
 support v3 TimeSync even though driver assumes v4 is supported by all
 Windows 10 hosts.
 The guest will stop trying to negotiate even though older supported
 versions may still be offered by the host.
 Make IC version negotiation more robust by going through all versions
 that are supported by the guest.
 Fixes: 3da0401b4d0e ("Drivers: hv: utils: Fix the mapping between host
 version and protocol to use")
 Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
 Signed-off-by: Alex Ng <alexng@messages.microsoft.com>
 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
 (cherry picked from commit a1656454131880980bc3a5313c8bf66ef5990c91)
 ---
 drivers/hv/channel_mgmt.c | 80 ++++++++++++++++++++++-----------
 drivers/hv/hv_fcopy.c     | 20 ++++++---
 drivers/hv/hv_kvp.c       | 41 +++++++----------
 drivers/hv/hv_snapshot.c  | 18 ++++++--
 drivers/hv/hv_util.c      | 94 +++++++++++++++++++++------------------
 include/linux/hyperv.h    |  7 +--
 6 files changed, 154 insertions(+), 106 deletions(-)
 diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
 index d838074e9add..095dd37367de 100644
 --- a/drivers/hv/channel_mgmt.c
 +++ b/drivers/hv/channel_mgmt.c
@@ -202,33 +202,34 @@ static u16 hv_get_dev_type(const struct vmbus_channel *channel)
  * @buf: Raw buffer channel data
  *
  * @icmsghdrp is of type &struct icmsg_hdr.
 - * @negop is of type &struct icmsg_negotiate.
  * Set up and fill in default negotiate response message.
  *
 - * The fw_version specifies the  framework version that
 - * we can support and srv_version specifies the service
 - * version we can support.
 + * The fw_version and fw_vercnt specifies the framework version that
 + * we can support.
 + *
 + * The srv_version and srv_vercnt specifies the service
 + * versions we can support.
 + *
 + * Versions are given in decreasing order.
 + *
 + * nego_fw_version and nego_srv_version store the selected protocol versions.
  *
  * Mainly used by Hyper-V drivers.
  */
 bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
 -				struct icmsg_negotiate *negop, u8 *buf,
 -				int fw_version, int srv_version)
 +				u8 *buf, const int *fw_version, int fw_vercnt,
 +				const int *srv_version, int srv_vercnt,
 +				int *nego_fw_version, int *nego_srv_version)
 {
 	int icframe_major, icframe_minor;
 	int icmsg_major, icmsg_minor;
 	int fw_major, fw_minor;
 	int srv_major, srv_minor;
 -	int i;
 +	int i, j;
 	bool found_match = false;
 +	struct icmsg_negotiate *negop;
 	icmsghdrp->icmsgsize = 0x10;
 -	fw_major = (fw_version >> 16);
 -	fw_minor = (fw_version & 0xFFFF);
 -
 -	srv_major = (srv_version >> 16);
 -	srv_minor = (srv_version & 0xFFFF);
 -
 	negop = (struct icmsg_negotiate *)&buf[
 		sizeof(struct vmbuspipe_hdr) +
 		sizeof(struct icmsg_hdr)];
@@ -244,13 +245,22 @@ bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
 	 * support.
 	 */
 -	for (i = 0; i < negop->icframe_vercnt; i++) {
 -		if ((negop->icversion_data[i].major == fw_major) &&
 -		   (negop->icversion_data[i].minor == fw_minor)) {
 -			icframe_major = negop->icversion_data[i].major;
 -			icframe_minor = negop->icversion_data[i].minor;
 -			found_match = true;
 +	for (i = 0; i < fw_vercnt; i++) {
 +		fw_major = (fw_version[i] >> 16);
 +		fw_minor = (fw_version[i] & 0xFFFF);
 +
 +		for (j = 0; j < negop->icframe_vercnt; j++) {
 +			if ((negop->icversion_data[j].major == fw_major) &&
 +			    (negop->icversion_data[j].minor == fw_minor)) {
 +				icframe_major = negop->icversion_data[j].major;
 +				icframe_minor = negop->icversion_data[j].minor;
 +				found_match = true;
 +				break;
 +			}
 		}
 +
 +		if (found_match)
 +			break;
 	}
 	if (!found_match)
@@ -258,14 +268,26 @@ bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
 	found_match = false;
 -	for (i = negop->icframe_vercnt;
 -		 (i < negop->icframe_vercnt + negop->icmsg_vercnt); i++) {
 -		if ((negop->icversion_data[i].major == srv_major) &&
 -		   (negop->icversion_data[i].minor == srv_minor)) {
 -			icmsg_major = negop->icversion_data[i].major;
 -			icmsg_minor = negop->icversion_data[i].minor;
 -			found_match = true;
 +	for (i = 0; i < srv_vercnt; i++) {
 +		srv_major = (srv_version[i] >> 16);
 +		srv_minor = (srv_version[i] & 0xFFFF);
 +
 +		for (j = negop->icframe_vercnt;
 +			(j < negop->icframe_vercnt + negop->icmsg_vercnt);
 +			j++) {
 +
 +			if ((negop->icversion_data[j].major == srv_major) &&
 +				(negop->icversion_data[j].minor == srv_minor)) {
 +
 +				icmsg_major = negop->icversion_data[j].major;
 +				icmsg_minor = negop->icversion_data[j].minor;
 +				found_match = true;
 +				break;
 +			}
 		}
 +
 +		if (found_match)
 +			break;
 	}
 	/*
@@ -282,6 +304,12 @@ bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
 		negop->icmsg_vercnt = 1;
 	}
 +	if (nego_fw_version)
 +		*nego_fw_version = (icframe_major << 16) | icframe_minor;
 +
 +	if (nego_srv_version)
 +		*nego_srv_version = (icmsg_major << 16) | icmsg_minor;
 +
 	negop->icversion_data[0].major = icframe_major;
 	negop->icversion_data[0].minor = icframe_minor;
 	negop->icversion_data[1].major = icmsg_major;
 diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c
 index 44420073edda..f1e0d0358206 100644
 --- a/drivers/hv/hv_fcopy.c
 +++ b/drivers/hv/hv_fcopy.c
@@ -31,6 +31,16 @@
 #define WIN8_SRV_MINOR		1
 #define WIN8_SRV_VERSION	(WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR)
 +#define FCOPY_VER_COUNT 1
 +static const int fcopy_versions[] = {
 +	WIN8_SRV_VERSION
 +};
 +
 +#define FW_VER_COUNT 1
 +static const int fw_versions[] = {
 +	UTIL_FW_VERSION
 +};
 +
 /*
  * Global state maintained for transaction that is being processed.
  * For a class of integration services, including the "file copy service",
@@ -231,8 +241,6 @@ void hv_fcopy_onchannelcallback(void *context)
 	u64 requestid;
 	struct hv_fcopy_hdr *fcopy_msg;
 	struct icmsg_hdr *icmsghdr;
 -	struct icmsg_negotiate *negop = NULL;
 -	int util_fw_version;
 	int fcopy_srv_version;
 	if (fcopy_transaction.state > HVUTIL_READY)
@@ -246,10 +254,10 @@ void hv_fcopy_onchannelcallback(void *context)
 	icmsghdr = (struct icmsg_hdr *)&recv_buffer[
 			sizeof(struct vmbuspipe_hdr)];
 	if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -		util_fw_version = UTIL_FW_VERSION;
 -		fcopy_srv_version = WIN8_SRV_VERSION;
 -		vmbus_prep_negotiate_resp(icmsghdr, negop, recv_buffer,
 -				util_fw_version, fcopy_srv_version);
 +		vmbus_prep_negotiate_resp(icmsghdr, recv_buffer,
 +				fw_versions, FW_VER_COUNT,
 +				fcopy_versions, FCOPY_VER_COUNT,
 +				NULL, &fcopy_srv_version);
 	} else {
 		fcopy_msg = (struct hv_fcopy_hdr *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
 index 2fd0f119a67b..820d4cd71fa9 100644
 --- a/drivers/hv/hv_kvp.c
 +++ b/drivers/hv/hv_kvp.c
@@ -46,6 +46,19 @@
 #define WIN8_SRV_MINOR   0
 #define WIN8_SRV_VERSION     (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR)
 +#define KVP_VER_COUNT 3
 +static const int kvp_versions[] = {
 +	WIN8_SRV_VERSION,
 +	WIN7_SRV_VERSION,
 +	WS2008_SRV_VERSION
 +};
 +
 +#define FW_VER_COUNT 2
 +static const int fw_versions[] = {
 +	UTIL_FW_VERSION,
 +	UTIL_WS2K8_FW_VERSION
 +};
 +
 /*
  * Global state maintained for transaction that is being processed. For a class
  * of integration services, including the "KVP service", the specified protocol
@@ -609,8 +622,6 @@ void hv_kvp_onchannelcallback(void *context)
 	struct hv_kvp_msg *kvp_msg;
 	struct icmsg_hdr *icmsghdrp;
 -	struct icmsg_negotiate *negop = NULL;
 -	int util_fw_version;
 	int kvp_srv_version;
 	static enum {NEGO_NOT_STARTED,
 		     NEGO_IN_PROGRESS,
@@ -640,28 +651,10 @@ void hv_kvp_onchannelcallback(void *context)
 			sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			/*
 -			 * Based on the host, select appropriate
 -			 * framework and service versions we will
 -			 * negotiate.
 -			 */
 -			switch (vmbus_proto_version) {
 -			case (VERSION_WS2008):
 -				util_fw_version = UTIL_WS2K8_FW_VERSION;
 -				kvp_srv_version = WS2008_SRV_VERSION;
 -				break;
 -			case (VERSION_WIN7):
 -				util_fw_version = UTIL_FW_VERSION;
 -				kvp_srv_version = WIN7_SRV_VERSION;
 -				break;
 -			default:
 -				util_fw_version = UTIL_FW_VERSION;
 -				kvp_srv_version = WIN8_SRV_VERSION;
 -			}
 -			vmbus_prep_negotiate_resp(icmsghdrp, negop,
 -				 recv_buffer, util_fw_version,
 -				 kvp_srv_version);
 -
 +			vmbus_prep_negotiate_resp(icmsghdrp,
 +				 recv_buffer, fw_versions, FW_VER_COUNT,
 +				 kvp_versions, KVP_VER_COUNT,
 +				 NULL, &kvp_srv_version);
 		} else {
 			kvp_msg = (struct hv_kvp_msg *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
 index eee238cc60bd..8e62bf7f6265 100644
 --- a/drivers/hv/hv_snapshot.c
 +++ b/drivers/hv/hv_snapshot.c
@@ -31,6 +31,16 @@
 #define VSS_MINOR  0
 #define VSS_VERSION    (VSS_MAJOR << 16 | VSS_MINOR)
 +#define VSS_VER_COUNT 1
 +static const int vss_versions[] = {
 +	VSS_VERSION
 +};
 +
 +#define FW_VER_COUNT 1
 +static const int fw_versions[] = {
 +	UTIL_FW_VERSION
 +};
 +
 /*
  * Timeout values are based on expecations from host
  */
@@ -296,7 +306,6 @@ void hv_vss_onchannelcallback(void *context)
 	struct icmsg_hdr *icmsghdrp;
 -	struct icmsg_negotiate *negop = NULL;
 	if (vss_transaction.state > HVUTIL_READY)
 		return;
@@ -309,9 +318,10 @@ void hv_vss_onchannelcallback(void *context)
 			sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp, negop,
 -				 recv_buffer, UTIL_FW_VERSION,
 -				 VSS_VERSION);
 +			vmbus_prep_negotiate_resp(icmsghdrp,
 +				 recv_buffer, fw_versions, FW_VER_COUNT,
 +				 vss_versions, VSS_VER_COUNT,
 +				 NULL, NULL);
 		} else {
 			vss_msg = (struct hv_vss_msg *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
 index e7707747f56d..f3797c07be10 100644
 --- a/drivers/hv/hv_util.c
 +++ b/drivers/hv/hv_util.c
@@ -57,7 +57,31 @@
 static int sd_srv_version;
 static int ts_srv_version;
 static int hb_srv_version;
 -static int util_fw_version;
 +
 +#define SD_VER_COUNT 2
 +static const int sd_versions[] = {
 +	SD_VERSION,
 +	SD_VERSION_1
 +};
 +
 +#define TS_VER_COUNT 3
 +static const int ts_versions[] = {
 +	TS_VERSION,
 +	TS_VERSION_3,
 +	TS_VERSION_1
 +};
 +
 +#define HB_VER_COUNT 2
 +static const int hb_versions[] = {
 +	HB_VERSION,
 +	HB_VERSION_1
 +};
 +
 +#define FW_VER_COUNT 2
 +static const int fw_versions[] = {
 +	UTIL_FW_VERSION,
 +	UTIL_WS2K8_FW_VERSION
 +};
 static void shutdown_onchannelcallback(void *context);
 static struct hv_util_service util_shutdown = {
@@ -118,7 +142,6 @@ static void shutdown_onchannelcallback(void *context)
 	struct shutdown_msg_data *shutdown_msg;
 	struct icmsg_hdr *icmsghdrp;
 -	struct icmsg_negotiate *negop = NULL;
 	vmbus_recvpacket(channel, shut_txf_buf,
 			 PAGE_SIZE, &recvlen, &requestid);
@@ -128,9 +151,14 @@ static void shutdown_onchannelcallback(void *context)
 			sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp, negop,
 -					shut_txf_buf, util_fw_version,
 -					sd_srv_version);
 +			if (vmbus_prep_negotiate_resp(icmsghdrp, shut_txf_buf,
 +					fw_versions, FW_VER_COUNT,
 +					sd_versions, SD_VER_COUNT,
 +					NULL, &sd_srv_version)) {
 +				pr_info("Shutdown IC version %d.%d\n",
 +					sd_srv_version >> 16,
 +					sd_srv_version & 0xFFFF);
 +			}
 		} else {
 			shutdown_msg =
 				(struct shutdown_msg_data *)&shut_txf_buf[
@@ -253,7 +281,6 @@ static void timesync_onchannelcallback(void *context)
 	struct ictimesync_data *timedatap;
 	struct ictimesync_ref_data *refdata;
 	u8 *time_txf_buf = util_timesynch.recv_buffer;
 -	struct icmsg_negotiate *negop = NULL;
 	vmbus_recvpacket(channel, time_txf_buf,
 			 PAGE_SIZE, &recvlen, &requestid);
@@ -263,12 +290,14 @@ static void timesync_onchannelcallback(void *context)
 				sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp, negop,
 -						time_txf_buf,
 -						util_fw_version,
 -						ts_srv_version);
 -			pr_info("Using TimeSync version %d.%d\n",
 -				ts_srv_version >> 16, ts_srv_version & 0xFFFF);
 +			if (vmbus_prep_negotiate_resp(icmsghdrp, time_txf_buf,
 +						fw_versions, FW_VER_COUNT,
 +						ts_versions, TS_VER_COUNT,
 +						NULL, &ts_srv_version)) {
 +				pr_info("TimeSync version %d.%d\n",
 +					ts_srv_version >> 16,
 +					ts_srv_version & 0xFFFF);
 +			}
 		} else {
 			if (ts_srv_version > TS_VERSION_3) {
 				refdata = (struct ictimesync_ref_data *)
@@ -312,7 +341,6 @@ static void heartbeat_onchannelcallback(void *context)
 	struct icmsg_hdr *icmsghdrp;
 	struct heartbeat_msg_data *heartbeat_msg;
 	u8 *hbeat_txf_buf = util_heartbeat.recv_buffer;
 -	struct icmsg_negotiate *negop = NULL;
 	while (1) {
@@ -326,9 +354,16 @@ static void heartbeat_onchannelcallback(void *context)
 				sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp, negop,
 -				hbeat_txf_buf, util_fw_version,
 -				hb_srv_version);
 +			if (vmbus_prep_negotiate_resp(icmsghdrp,
 +					hbeat_txf_buf,
 +					fw_versions, FW_VER_COUNT,
 +					hb_versions, HB_VER_COUNT,
 +					NULL, &hb_srv_version)) {
 +
 +				pr_info("Heartbeat version %d.%d\n",
 +					hb_srv_version >> 16,
 +					hb_srv_version & 0xFFFF);
 +			}
 		} else {
 			heartbeat_msg =
 				(struct heartbeat_msg_data *)&hbeat_txf_buf[
@@ -378,33 +413,6 @@ static int util_probe(struct hv_device *dev,
 	hv_set_drvdata(dev, srv);
 -	/*
 -	 * Based on the host; initialize the framework and
 -	 * service version numbers we will negotiate.
 -	 */
 -	switch (vmbus_proto_version) {
 -	case (VERSION_WS2008):
 -		util_fw_version = UTIL_WS2K8_FW_VERSION;
 -		sd_srv_version = SD_VERSION_1;
 -		ts_srv_version = TS_VERSION_1;
 -		hb_srv_version = HB_VERSION_1;
 -		break;
 -	case VERSION_WIN7:
 -	case VERSION_WIN8:
 -	case VERSION_WIN8_1:
 -		util_fw_version = UTIL_FW_VERSION;
 -		sd_srv_version = SD_VERSION;
 -		ts_srv_version = TS_VERSION_3;
 -		hb_srv_version = HB_VERSION;
 -		break;
 -	case VERSION_WIN10:
 -	default:
 -		util_fw_version = UTIL_FW_VERSION;
 -		sd_srv_version = SD_VERSION;
 -		ts_srv_version = TS_VERSION;
 -		hb_srv_version = HB_VERSION;
 -	}
 -
 	ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
 			srv->util_cb, dev->channel);
 	if (ret)
 diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
 index c9af8369b4f7..7df9eb8f0cf7 100644
 --- a/include/linux/hyperv.h
 +++ b/include/linux/hyperv.h
@@ -1453,9 +1453,10 @@ struct hyperv_service_callback {
 };
 #define MAX_SRV_VER	0x7ffffff
 -extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *,
 -					struct icmsg_negotiate *, u8 *, int,
 -					int);
 +extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf,
 +				const int *fw_version, int fw_vercnt,
 +				const int *srv_version, int srv_vercnt,
 +				int *nego_fw_version, int *nego_srv_version);
 void hv_event_tasklet_disable(struct vmbus_channel *channel);
 void hv_event_tasklet_enable(struct vmbus_channel *channel);
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0009-Drivers-hv-Log-the-negotiated-IC-versions.patch
+++ b/kernel/patches-4.9.x/0009-Drivers-hv-Log-the-negotiated-IC-versions.patch
@ -1,118 +0,0 @@
 From 4ececf204f51b6789d273f56ef4011272eb6286a Mon Sep 17 00:00:00 2001
 From: Alex Ng <alexng@messages.microsoft.com>
 Date: Sat, 28 Jan 2017 12:37:18 -0700
 Subject: [PATCH 09/14] Drivers: hv: Log the negotiated IC versions.
 Log the negotiated IC versions.
 Signed-off-by: Alex Ng <alexng@messages.microsoft.com>
 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
 (cherry picked from commit 1274a690f6b2bd2b37447c47e3062afa8aa43f93)
 ---
 drivers/hv/hv_fcopy.c    |  9 +++++++--
 drivers/hv/hv_kvp.c      |  8 ++++++--
 drivers/hv/hv_snapshot.c | 11 ++++++++---
 drivers/hv/hv_util.c     |  4 ++--
 4 files changed, 23 insertions(+), 9 deletions(-)
 diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c
 index f1e0d0358206..e0ce0753c568 100644
 --- a/drivers/hv/hv_fcopy.c
 +++ b/drivers/hv/hv_fcopy.c
@@ -254,10 +254,15 @@ void hv_fcopy_onchannelcallback(void *context)
 	icmsghdr = (struct icmsg_hdr *)&recv_buffer[
 			sizeof(struct vmbuspipe_hdr)];
 	if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -		vmbus_prep_negotiate_resp(icmsghdr, recv_buffer,
 +		if (vmbus_prep_negotiate_resp(icmsghdr, recv_buffer,
 				fw_versions, FW_VER_COUNT,
 				fcopy_versions, FCOPY_VER_COUNT,
 -				NULL, &fcopy_srv_version);
 +				NULL, &fcopy_srv_version)) {
 +
 +			pr_info("FCopy IC version %d.%d\n",
 +				fcopy_srv_version >> 16,
 +				fcopy_srv_version & 0xFFFF);
 +		}
 	} else {
 		fcopy_msg = (struct hv_fcopy_hdr *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
 index 820d4cd71fa9..18c4deb39f41 100644
 --- a/drivers/hv/hv_kvp.c
 +++ b/drivers/hv/hv_kvp.c
@@ -651,10 +651,14 @@ void hv_kvp_onchannelcallback(void *context)
 			sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp,
 +			if (vmbus_prep_negotiate_resp(icmsghdrp,
 				 recv_buffer, fw_versions, FW_VER_COUNT,
 				 kvp_versions, KVP_VER_COUNT,
 -				 NULL, &kvp_srv_version);
 +				 NULL, &kvp_srv_version)) {
 +				pr_info("KVP IC version %d.%d\n",
 +					kvp_srv_version >> 16,
 +					kvp_srv_version & 0xFFFF);
 +			}
 		} else {
 			kvp_msg = (struct hv_kvp_msg *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c
 index 8e62bf7f6265..e659d1b94a57 100644
 --- a/drivers/hv/hv_snapshot.c
 +++ b/drivers/hv/hv_snapshot.c
@@ -303,7 +303,7 @@ void hv_vss_onchannelcallback(void *context)
 	u32 recvlen;
 	u64 requestid;
 	struct hv_vss_msg *vss_msg;
 -
 +	int vss_srv_version;
 	struct icmsg_hdr *icmsghdrp;
@@ -318,10 +318,15 @@ void hv_vss_onchannelcallback(void *context)
 			sizeof(struct vmbuspipe_hdr)];
 		if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
 -			vmbus_prep_negotiate_resp(icmsghdrp,
 +			if (vmbus_prep_negotiate_resp(icmsghdrp,
 				 recv_buffer, fw_versions, FW_VER_COUNT,
 				 vss_versions, VSS_VER_COUNT,
 -				 NULL, NULL);
 +				 NULL, &vss_srv_version)) {
 +
 +				pr_info("VSS IC version %d.%d\n",
 +					vss_srv_version >> 16,
 +					vss_srv_version & 0xFFFF);
 +			}
 		} else {
 			vss_msg = (struct hv_vss_msg *)&recv_buffer[
 				sizeof(struct vmbuspipe_hdr) +
 diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
 index f3797c07be10..89440c2eb346 100644
 --- a/drivers/hv/hv_util.c
 +++ b/drivers/hv/hv_util.c
@@ -294,7 +294,7 @@ static void timesync_onchannelcallback(void *context)
 						fw_versions, FW_VER_COUNT,
 						ts_versions, TS_VER_COUNT,
 						NULL, &ts_srv_version)) {
 -				pr_info("TimeSync version %d.%d\n",
 +				pr_info("TimeSync IC version %d.%d\n",
 					ts_srv_version >> 16,
 					ts_srv_version & 0xFFFF);
 			}
@@ -360,7 +360,7 @@ static void heartbeat_onchannelcallback(void *context)
 					hb_versions, HB_VER_COUNT,
 					NULL, &hb_srv_version)) {
 -				pr_info("Heartbeat version %d.%d\n",
 +				pr_info("Heartbeat IC version %d.%d\n",
 					hb_srv_version >> 16,
 					hb_srv_version & 0xFFFF);
 			}
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0010-vmbus-fix-missed-ring-events-on-boot.patch
+++ b/kernel/patches-4.9.x/0010-vmbus-fix-missed-ring-events-on-boot.patch
@ -1,56 +0,0 @@
 From 9437b5fd5eb5570a82f7c79672007240ba866966 Mon Sep 17 00:00:00 2001
 From: Dexuan Cui <decui@microsoft.com>
 Date: Sun, 26 Mar 2017 16:42:20 +0800
 Subject: [PATCH 10/14] vmbus: fix missed ring events on boot
 During initialization, the channel initialization code schedules the
 tasklet to scan the VMBUS receive event page (i.e. simulates an
 interrupt). The problem was that it invokes the tasklet on a different
 CPU from where it normally runs and therefore if an event is present,
 it will clear the bit but not find the associated channel.
 This can lead to missed events, typically stuck tasks, during bootup
 when sub channels are being initialized. Typically seen as stuck
 boot with 8 or more CPU's.
 This patch is not necessary for upstream (4.11 and later) since
 commit 631e63a9f346 ("vmbus: change to per channel tasklet").
 This changed vmbus code to get rid of common tasklet which
 caused the problem.
 Cc: stable@vger.kernel.org
 Fixes: 638fea33aee8 ("Drivers: hv: vmbus: fix the race when querying & updating the percpu list")
 Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
 Origin: git@github.com:dcui/linux.git
 (cherry picked from commit 5cf3a72a111cecc7da759542c56560ce509159d7)
 ---
 drivers/hv/channel_mgmt.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
 diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
 index 095dd37367de..effac8042dc6 100644
 --- a/drivers/hv/channel_mgmt.c
 +++ b/drivers/hv/channel_mgmt.c
@@ -388,8 +388,17 @@ void hv_event_tasklet_enable(struct vmbus_channel *channel)
 	tasklet = hv_context.event_dpc[channel->target_cpu];
 	tasklet_enable(tasklet);
 -	/* In case there is any pending event */
 -	tasklet_schedule(tasklet);
 +	/*
 +	 * In case there is any pending event schedule a rescan
 +	 * but must be on the correct CPU for the channel.
 +	 */
 +	if (channel->target_cpu == get_cpu())
 +		tasklet_schedule(tasklet);
 +	else
 +		smp_call_function_single(channel->target_cpu,
 +					 (smp_call_func_t)tasklet_schedule,
 +					 tasklet, false);
 +	put_cpu();
 }
 void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0011-vmbus-remove-goto-error_clean_msglist-in-vmbus_open.patch
+++ b/kernel/patches-4.9.x/0011-vmbus-remove-goto-error_clean_msglist-in-vmbus_open.patch
@ -1,60 +0,0 @@
 From 59bdf5a956bb431016fb00b135952d62ab8017af Mon Sep 17 00:00:00 2001
 From: Dexuan Cui <decui@microsoft.com>
 Date: Wed, 29 Mar 2017 18:37:10 +0800
 Subject: [PATCH 11/14] vmbus: remove "goto error_clean_msglist" in
 vmbus_open()
 This is just a cleanup patch to simplify the code a little.
 No semantic change.
 Signed-off-by: Dexuan Cui <decui@microsoft.com>
 Origin: git@github.com:dcui/linux.git
 (cherry picked from commit 2c89f21cbdfd39299482cd6068094097a45f13b3)
 ---
 drivers/hv/channel.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)
 diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
 index 784c45484825..fb94b96e8469 100644
 --- a/drivers/hv/channel.c
 +++ b/drivers/hv/channel.c
@@ -184,17 +184,18 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 	ret = vmbus_post_msg(open_msg,
 			     sizeof(struct vmbus_channel_open_channel), true);
 -	if (ret != 0) {
 -		err = ret;
 -		goto error_clean_msglist;
 -	}
 -
 -	wait_for_completion(&open_info->waitevent);
 +	if (ret == 0)
 +		wait_for_completion(&open_info->waitevent);
 	spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
 	list_del(&open_info->msglistentry);
 	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
 +	if (ret != 0) {
 +		err = ret;
 +		goto error_free_gpadl;
 +	}
 +
 	if (newchannel->rescind) {
 		err = -ENODEV;
 		goto error_free_gpadl;
@@ -209,11 +210,6 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 	kfree(open_info);
 	return 0;
 -error_clean_msglist:
 -	spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
 -	list_del(&open_info->msglistentry);
 -	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
 -
 error_free_gpadl:
 	vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
 	kfree(open_info);
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0012-vmbus-dynamically-enqueue-dequeue-the-channel-on-vmb.patch
+++ b/kernel/patches-4.9.x/0012-vmbus-dynamically-enqueue-dequeue-the-channel-on-vmb.patch
@ -1,177 +0,0 @@
 From b42442dd3866916eaa11904b9d92b35bec5231c7 Mon Sep 17 00:00:00 2001
 From: Dexuan Cui <decui@microsoft.com>
 Date: Fri, 24 Mar 2017 20:53:18 +0800
 Subject: [PATCH 12/14] vmbus: dynamically enqueue/dequeue the channel on
 vmbus_open/close
 Signed-off-by: Dexuan Cui <decui@microsoft.com>
 Origin: git@github.com:dcui/linux.git
 (cherry picked from commit bee4910daa4aed57ce60d2e2350e3cc120c383ca)
 ---
 drivers/hv/channel.c      | 16 +++++++++--
 drivers/hv/channel_mgmt.c | 58 ++++++++++++++++-----------------------
 include/linux/hyperv.h    |  3 ++
 3 files changed, 40 insertions(+), 37 deletions(-)
 diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
 index fb94b96e8469..22e62fe70de3 100644
 --- a/drivers/hv/channel.c
 +++ b/drivers/hv/channel.c
@@ -181,6 +181,10 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 		      &vmbus_connection.chn_msg_list);
 	spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
 +	hv_event_tasklet_disable(newchannel);
 +	hv_percpu_channel_enq(newchannel);
 +	hv_event_tasklet_enable(newchannel);
 +
 	ret = vmbus_post_msg(open_msg,
 			     sizeof(struct vmbus_channel_open_channel), true);
@@ -193,23 +197,27 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
 	if (ret != 0) {
 		err = ret;
 -		goto error_free_gpadl;
 +		goto error_deq_channel;
 	}
 	if (newchannel->rescind) {
 		err = -ENODEV;
 -		goto error_free_gpadl;
 +		goto error_deq_channel;
 	}
 	if (open_info->response.open_result.status) {
 		err = -EAGAIN;
 -		goto error_free_gpadl;
 +		goto error_deq_channel;
 	}
 	newchannel->state = CHANNEL_OPENED_STATE;
 	kfree(open_info);
 	return 0;
 +error_deq_channel:
 +	hv_event_tasklet_disable(newchannel);
 +	hv_percpu_channel_deq(newchannel);
 +	hv_event_tasklet_enable(newchannel);
 error_free_gpadl:
 	vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
 	kfree(open_info);
@@ -563,6 +571,8 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
 		goto out;
 	}
 +	hv_percpu_channel_deq(channel);
 +
 	channel->state = CHANNEL_OPEN_STATE;
 	channel->sc_creation_callback = NULL;
 	/* Stop callback and cancel the timer asap */
 diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
 index effac8042dc6..5470eeaf3f45 100644
 --- a/drivers/hv/channel_mgmt.c
 +++ b/drivers/hv/channel_mgmt.c
@@ -375,6 +375,30 @@ static void vmbus_release_relid(u32 relid)
 		       true);
 }
 +void hv_percpu_channel_enq(struct vmbus_channel *channel)
 +{
 +	if (channel->target_cpu != get_cpu())
 +		smp_call_function_single(channel->target_cpu,
 +					 percpu_channel_enq,
 +					 channel, true);
 +	else
 +		percpu_channel_enq(channel);
 +	put_cpu();
 +
 +}
 +
 +void hv_percpu_channel_deq(struct vmbus_channel *channel)
 +{
 +	if (channel->target_cpu != get_cpu())
 +		smp_call_function_single(channel->target_cpu,
 +					 percpu_channel_deq,
 +					 channel, true);
 +	else
 +		percpu_channel_deq(channel);
 +	put_cpu();
 +
 +}
 +
 void hv_event_tasklet_disable(struct vmbus_channel *channel)
 {
 	struct tasklet_struct *tasklet;
@@ -409,17 +433,6 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid)
 	BUG_ON(!channel->rescind);
 	BUG_ON(!mutex_is_locked(&vmbus_connection.channel_mutex));
 -	hv_event_tasklet_disable(channel);
 -	if (channel->target_cpu != get_cpu()) {
 -		put_cpu();
 -		smp_call_function_single(channel->target_cpu,
 -					 percpu_channel_deq, channel, true);
 -	} else {
 -		percpu_channel_deq(channel);
 -		put_cpu();
 -	}
 -	hv_event_tasklet_enable(channel);
 -
 	if (channel->primary_channel == NULL) {
 		list_del(&channel->listentry);
@@ -512,18 +525,6 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
 	init_vp_index(newchannel, dev_type);
 -	hv_event_tasklet_disable(newchannel);
 -	if (newchannel->target_cpu != get_cpu()) {
 -		put_cpu();
 -		smp_call_function_single(newchannel->target_cpu,
 -					 percpu_channel_enq,
 -					 newchannel, true);
 -	} else {
 -		percpu_channel_enq(newchannel);
 -		put_cpu();
 -	}
 -	hv_event_tasklet_enable(newchannel);
 -
 	/*
 	 * This state is used to indicate a successful open
 	 * so that when we do close the channel normally, we
@@ -572,17 +573,6 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel)
 	list_del(&newchannel->listentry);
 	mutex_unlock(&vmbus_connection.channel_mutex);
 -	hv_event_tasklet_disable(newchannel);
 -	if (newchannel->target_cpu != get_cpu()) {
 -		put_cpu();
 -		smp_call_function_single(newchannel->target_cpu,
 -					 percpu_channel_deq, newchannel, true);
 -	} else {
 -		percpu_channel_deq(newchannel);
 -		put_cpu();
 -	}
 -	hv_event_tasklet_enable(newchannel);
 -
 	vmbus_release_relid(newchannel->offermsg.child_relid);
 err_free_chan:
 diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
 index 7df9eb8f0cf7..a87757cf277b 100644
 --- a/include/linux/hyperv.h
 +++ b/include/linux/hyperv.h
@@ -1461,6 +1461,9 @@ extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, u8 *buf,
 void hv_event_tasklet_disable(struct vmbus_channel *channel);
 void hv_event_tasklet_enable(struct vmbus_channel *channel);
 +void hv_percpu_channel_enq(struct vmbus_channel *channel);
 +void hv_percpu_channel_deq(struct vmbus_channel *channel);
 +
 void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid);
 void vmbus_setevent(struct vmbus_channel *channel);
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0013-bridge-implement-missing-ndo_uninit.patch
+++ b/kernel/patches-4.9.x/0013-bridge-implement-missing-ndo_uninit.patch
@ -1,142 +0,0 @@
 From 6dbc83e7d8729d2af84a769107e1c02963407fc9 Mon Sep 17 00:00:00 2001
 From: Ido Schimmel <idosch@mellanox.com>
 Date: Mon, 10 Apr 2017 14:59:27 +0300
 Subject: [PATCH 13/14] bridge: implement missing ndo_uninit()
 While the bridge driver implements an ndo_init(), it was missing a
 symmetric ndo_uninit(), causing the different de-initialization
 operations to be scattered around its dellink() and destructor().
 Implement a symmetric ndo_uninit() and remove the overlapping operations
 from its dellink() and destructor().
 This is a prerequisite for the next patch, as it allows us to have a
 proper cleanup upon changelink() failure during the bridge's newlink().
 Fixes: b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()")
 Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
 Signed-off-by: Ido Schimmel <idosch@mellanox.com>
 Signed-off-by: David S. Miller <davem@davemloft.net>
 (cherry picked from commit b6fe0440c63716e09cfc0d1484e3898a0f29d1d1)
 ---
 net/bridge/br_device.c    | 20 +++++++++++---------
 net/bridge/br_if.c        |  1 -
 net/bridge/br_multicast.c |  7 +++++--
 net/bridge/br_private.h   |  5 +++++
 4 files changed, 21 insertions(+), 12 deletions(-)
 diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
 index 5f5e28f210e0..15be72678bc8 100644
 --- a/net/bridge/br_device.c
 +++ b/net/bridge/br_device.c
@@ -122,6 +122,15 @@ static int br_dev_init(struct net_device *dev)
 	return err;
 }
 +static void br_dev_uninit(struct net_device *dev)
 +{
 +	struct net_bridge *br = netdev_priv(dev);
 +
 +	br_multicast_uninit_stats(br);
 +	br_vlan_flush(br);
 +	free_percpu(br->stats);
 +}
 +
 static int br_dev_open(struct net_device *dev)
 {
 	struct net_bridge *br = netdev_priv(dev);
@@ -337,6 +346,7 @@ static const struct net_device_ops br_netdev_ops = {
 	.ndo_open		 = br_dev_open,
 	.ndo_stop		 = br_dev_stop,
 	.ndo_init		 = br_dev_init,
 +	.ndo_uninit		 = br_dev_uninit,
 	.ndo_start_xmit		 = br_dev_xmit,
 	.ndo_get_stats64	 = br_get_stats64,
 	.ndo_set_mac_address	 = br_set_mac_address,
@@ -363,14 +373,6 @@ static const struct net_device_ops br_netdev_ops = {
 	.ndo_features_check	 = passthru_features_check,
 };
 -static void br_dev_free(struct net_device *dev)
 -{
 -	struct net_bridge *br = netdev_priv(dev);
 -
 -	free_percpu(br->stats);
 -	free_netdev(dev);
 -}
 -
 static struct device_type br_type = {
 	.name	= "bridge",
 };
@@ -383,7 +385,7 @@ void br_dev_setup(struct net_device *dev)
 	ether_setup(dev);
 	dev->netdev_ops = &br_netdev_ops;
 -	dev->destructor = br_dev_free;
 +	dev->destructor = free_netdev;
 	dev->ethtool_ops = &br_ethtool_ops;
 	SET_NETDEV_DEVTYPE(dev, &br_type);
 	dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
 diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
 index 925818a05398..191b1f23c160 100644
 --- a/net/bridge/br_if.c
 +++ b/net/bridge/br_if.c
@@ -311,7 +311,6 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
 	br_fdb_delete_by_port(br, NULL, 0, 1);
 -	br_vlan_flush(br);
 	br_multicast_dev_del(br);
 	del_timer_sync(&br->gc_timer);
 diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
 index 80c81c7e3cf9..8b3a5dfa4e7f 100644
 --- a/net/bridge/br_multicast.c
 +++ b/net/bridge/br_multicast.c
@@ -1905,8 +1905,6 @@ void br_multicast_dev_del(struct net_bridge *br)
 out:
 	spin_unlock_bh(&br->multicast_lock);
 -
 -	free_percpu(br->mcast_stats);
 }
 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
@@ -2363,6 +2361,11 @@ int br_multicast_init_stats(struct net_bridge *br)
 	return 0;
 }
 +void br_multicast_uninit_stats(struct net_bridge *br)
 +{
 +	free_percpu(br->mcast_stats);
 +}
 +
 static void mcast_stats_add_dir(u64 *dst, u64 *src)
 {
 	dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
 diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
 index 1b63177e0ccd..417edbe7b8b2 100644
 --- a/net/bridge/br_private.h
 +++ b/net/bridge/br_private.h
@@ -601,6 +601,7 @@ void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 			const struct sk_buff *skb, u8 type, u8 dir);
 int br_multicast_init_stats(struct net_bridge *br);
 +void br_multicast_uninit_stats(struct net_bridge *br);
 void br_multicast_get_stats(const struct net_bridge *br,
 			    const struct net_bridge_port *p,
 			    struct br_mcast_stats *dest);
@@ -741,6 +742,10 @@ static inline int br_multicast_init_stats(struct net_bridge *br)
 	return 0;
 }
 +static inline void br_multicast_uninit_stats(struct net_bridge *br)
 +{
 +}
 +
 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 {
 	return 0;
 -- 
 2.24.0
--- a/kernel/patches-4.9.x/0014-bridge-move-bridge-multicast-cleanup-to-ndo_uninit.patch
+++ b/kernel/patches-4.9.x/0014-bridge-move-bridge-multicast-cleanup-to-ndo_uninit.patch
@ -1,109 +0,0 @@
 From 41661998f27ab61e9b5a134375ecb8c007c57c11 Mon Sep 17 00:00:00 2001
 From: Xin Long <lucien.xin@gmail.com>
 Date: Tue, 25 Apr 2017 22:58:37 +0800
 Subject: [PATCH 14/14] bridge: move bridge multicast cleanup to ndo_uninit
 During removing a bridge device, if the bridge is still up, a new mdb entry
 still can be added in br_multicast_add_group() after all mdb entries are
 removed in br_multicast_dev_del(). Like the path:
  mld_ifc_timer_expire ->
    mld_sendpack -> ...
      br_multicast_rcv ->
        br_multicast_add_group
 The new mp's timer will be set up. If the timer expires after the bridge
 is freed, it may cause use-after-free panic in br_multicast_group_expired.
 BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
 IP: [<ffffffffa07ed2c8>] br_multicast_group_expired+0x28/0xb0 [bridge]
 Call Trace:
 <IRQ>
 [<ffffffff81094536>] call_timer_fn+0x36/0x110
 [<ffffffffa07ed2a0>] ? br_mdb_free+0x30/0x30 [bridge]
 [<ffffffff81096967>] run_timer_softirq+0x237/0x340
 [<ffffffff8108dcbf>] __do_softirq+0xef/0x280
 [<ffffffff8169889c>] call_softirq+0x1c/0x30
 [<ffffffff8102c275>] do_softirq+0x65/0xa0
 [<ffffffff8108e055>] irq_exit+0x115/0x120
 [<ffffffff81699515>] smp_apic_timer_interrupt+0x45/0x60
 [<ffffffff81697a5d>] apic_timer_interrupt+0x6d/0x80
 Nikolay also found it would cause a memory leak - the mdb hash is
 reallocated and not freed due to the mdb rehash.
 unreferenced object 0xffff8800540ba800 (size 2048):
  backtrace:
    [<ffffffff816e2287>] kmemleak_alloc+0x67/0xc0
    [<ffffffff81260bea>] __kmalloc+0x1ba/0x3e0
    [<ffffffffa05c60ee>] br_mdb_rehash+0x5e/0x340 [bridge]
    [<ffffffffa05c74af>] br_multicast_new_group+0x43f/0x6e0 [bridge]
    [<ffffffffa05c7aa3>] br_multicast_add_group+0x203/0x260 [bridge]
    [<ffffffffa05ca4b5>] br_multicast_rcv+0x945/0x11d0 [bridge]
    [<ffffffffa05b6b10>] br_dev_xmit+0x180/0x470 [bridge]
    [<ffffffff815c781b>] dev_hard_start_xmit+0xbb/0x3d0
    [<ffffffff815c8743>] __dev_queue_xmit+0xb13/0xc10
    [<ffffffff815c8850>] dev_queue_xmit+0x10/0x20
    [<ffffffffa02f8d7a>] ip6_finish_output2+0x5ca/0xac0 [ipv6]
    [<ffffffffa02fbfc6>] ip6_finish_output+0x126/0x2c0 [ipv6]
    [<ffffffffa02fc245>] ip6_output+0xe5/0x390 [ipv6]
    [<ffffffffa032b92c>] NF_HOOK.constprop.44+0x6c/0x240 [ipv6]
    [<ffffffffa032bd16>] mld_sendpack+0x216/0x3e0 [ipv6]
    [<ffffffffa032d5eb>] mld_ifc_timer_expire+0x18b/0x2b0 [ipv6]
 This could happen when ip link remove a bridge or destroy a netns with a
 bridge device inside.
 With Nikolay's suggestion, this patch is to clean up bridge multicast in
 ndo_uninit after bridge dev is shutdown, instead of br_dev_delete, so
 that netif_running check in br_multicast_add_group can avoid this issue.
 v1->v2:
  - fix this issue by moving br_multicast_dev_del to ndo_uninit, instead
    of calling dev_close in br_dev_delete.
 (NOTE: Depends upon b6fe0440c637 ("bridge: implement missing ndo_uninit()"))
 (NOTE: Manually fixed cherry-pick conflict as the code in the vicinity had
 changed. The logic of this fix should be preserved)
 Fixes: e10177abf842 ("bridge: multicast: fix handling of temp and perm entries")
 Reported-by: Jianwen Ji <jiji@redhat.com>
 Signed-off-by: Xin Long <lucien.xin@gmail.com>
 Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
 Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
 Signed-off-by: David S. Miller <davem@davemloft.net>
 Signed-off-by: Rolf Neugebauer <rn@rneugeba.io>
 (cherry picked from commit b1b9d366028ff580e6dd80b48a69c473361456f1)
 ---
 net/bridge/br_device.c | 1 +
 net/bridge/br_if.c     | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)
 diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
 index 15be72678bc8..a0a7bb6a991f 100644
 --- a/net/bridge/br_device.c
 +++ b/net/bridge/br_device.c
@@ -126,6 +126,7 @@ static void br_dev_uninit(struct net_device *dev)
 {
 	struct net_bridge *br = netdev_priv(dev);
 +	br_multicast_dev_del(br);
 	br_multicast_uninit_stats(br);
 	br_vlan_flush(br);
 	free_percpu(br->stats);
 diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
 index 191b1f23c160..93d08d1b039e 100644
 --- a/net/bridge/br_if.c
 +++ b/net/bridge/br_if.c
@@ -311,7 +311,6 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
 	br_fdb_delete_by_port(br, NULL, 0, 1);
 -	br_multicast_dev_del(br);
 	del_timer_sync(&br->gc_timer);
 	br_sysfs_delbr(br->dev);
 -- 
 2.24.0
--- a/test/cases/020_kernel/001_config_4.9.x/test.sh
+++ b/test/cases/020_kernel/001_config_4.9.x/test.sh
@ -1,24 +0,0 @@
 #!/bin/sh
 # SUMMARY: Sanity check on the kernel config file
 # LABELS:
 # REPEAT:
 set -e
 # Source libraries. Uncomment if needed/defined
 #. "${RT_LIB}"
 . "${RT_PROJECT_ROOT}/_lib/lib.sh"
 NAME=kconfig
 clean_up() {
 	rm -rf ${NAME}-*
 }
 trap clean_up EXIT
 # Test code goes here
 linuxkit build -format kernel+initrd -name "${NAME}" test.yml
 RESULT="$(linuxkit run ${NAME})"
 echo "${RESULT}" | grep -q "suite PASSED"
 exit 0
--- a/test/cases/020_kernel/001_config_4.9.x/test.yml
+++ b/test/cases/020_kernel/001_config_4.9.x/test.yml
@ -1,15 +0,0 @@
 kernel:
  image: linuxkit/kernel:4.9.206
  cmdline: "console=ttyS0 console=ttyAMA0"
 init:
  - linuxkit/init:a4fcf333298f644dfac6adf680b83140927aa85e
  - linuxkit/runc:69b4a35eaa22eba4990ee52cccc8f48f6c08ed03
 onboot:
  - name: check-kernel-config
    image: linuxkit/test-kernel-config:94fdeb494e09200fc05b6da39822aabfaca234e4
  - name: poweroff
    image: linuxkit/poweroff:b498d30dd9660090565537fceb9e757618737a85
    command: ["/bin/sh", "/poweroff.sh", "3"]
 trust:
  org:
    - linuxkit
--- a/test/cases/020_kernel/101_kmod_4.9.x/Dockerfile
+++ b/test/cases/020_kernel/101_kmod_4.9.x/Dockerfile
@ -1,23 +0,0 @@
 # This Dockerfile extracts the kernel headers from the kernel image
 # and then compiles a simple hello world kernel module against them.
 # In the last stage, it creates a package, which can be used for
 # testing.
 FROM linuxkit/kernel:4.9.206 AS ksrc
 # Extract headers and compile module
 FROM linuxkit/alpine:3fdc49366257e53276c6f363956a4353f95d9a81 AS build
 RUN apk add build-base elfutils-dev
 COPY --from=ksrc /kernel-dev.tar /
 RUN tar xf kernel-dev.tar
 WORKDIR /kmod
 COPY ./src/* ./
 RUN make all
 # Package
 FROM alpine:3.9
 COPY --from=build /kmod/hello_world.ko /
 COPY check.sh /check.sh
 ENTRYPOINT ["/bin/sh", "/check.sh"]
--- a/test/cases/020_kernel/101_kmod_4.9.x/check.sh
+++ b/test/cases/020_kernel/101_kmod_4.9.x/check.sh
@ -1,15 +0,0 @@
 #!/bin/sh
 function failed {
 	printf "Kernel module test suite FAILED\n"
 	/sbin/poweroff -f
 }
 uname -a
 modinfo hello_world.ko || failed
 insmod hello_world.ko || failed
 [ -n "$(dmesg | grep -o 'Hello LinuxKit')" ] || failed
 rmmod hello_world || failed
 printf "Kernel module test suite PASSED\n"
 /sbin/poweroff -f
--- a/test/cases/020_kernel/101_kmod_4.9.x/src/Makefile
+++ b/test/cases/020_kernel/101_kmod_4.9.x/src/Makefile
@ -1,6 +0,0 @@
 obj-m += hello_world.o
 KVER=$(shell basename /usr/src/linux-headers-*)
 all:
 	make -C /usr/src/$(KVER) M=$(PWD) modules
 clean:
 	make -C /usr/src/$(KVER) M=$(PWD) clean
--- a/test/cases/020_kernel/101_kmod_4.9.x/src/hello_world.c
+++ b/test/cases/020_kernel/101_kmod_4.9.x/src/hello_world.c
@ -1,22 +0,0 @@
 /*  
 * A simple Hello World kernel module 
 */
 #include <linux/module.h>
 #include <linux/kernel.h>
 int init_hello(void)
 {
 	printk(KERN_INFO "Hello LinuxKit\n");
 	return 0;
 }
 void exit_hello(void)
 {
 	printk(KERN_INFO "Goodbye LinuxKit.\n");
 }
 module_init(init_hello);
 module_exit(exit_hello);
 MODULE_AUTHOR("Rolf Neugebauer <rolf.neugebauer@docker.com>");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("A simple Hello World kernel module for testing");
--- a/test/cases/020_kernel/101_kmod_4.9.x/test.sh
+++ b/test/cases/020_kernel/101_kmod_4.9.x/test.sh
@ -1,31 +0,0 @@
 #!/bin/sh
 # SUMMARY: Test build and insertion of kernel modules
 # LABELS:
 # REPEAT:
 set -e
 # Source libraries. Uncomment if needed/defined
 #. "${RT_LIB}"
 . "${RT_PROJECT_ROOT}/_lib/lib.sh"
 NAME=kmod
 IMAGE_NAME=kmod-test
 clean_up() {
 	docker rmi ${IMAGE_NAME} || true
 	rm -rf ${NAME}-*
 }
 trap clean_up EXIT
 # Make sure we have the latest kernel image
 docker pull linuxkit/kernel:4.9.206
 # Build a package
 docker build -t ${IMAGE_NAME} .
 # Build and run a LinuxKit image with kernel module (and test script)
 linuxkit build -format kernel+initrd -name "${NAME}" test.yml
 RESULT="$(linuxkit run ${NAME})"
 echo "${RESULT}" | grep -q "Hello LinuxKit"
 exit 0
--- a/test/cases/020_kernel/101_kmod_4.9.x/test.yml
+++ b/test/cases/020_kernel/101_kmod_4.9.x/test.yml
@ -1,20 +0,0 @@
 kernel:
  image: linuxkit/kernel:4.9.206
  cmdline: "console=ttyS0 console=ttyAMA0"
 init:
  - linuxkit/init:a4fcf333298f644dfac6adf680b83140927aa85e
  - linuxkit/runc:69b4a35eaa22eba4990ee52cccc8f48f6c08ed03
 onboot:
  - name: check
    image: kmod-test
    binds:
     - /dev:/dev
     - /lib/modules:/lib/modules
    capabilities:
     - all
  - name: poweroff
    image: linuxkit/poweroff:b498d30dd9660090565537fceb9e757618737a85
    command: ["/bin/sh", "/poweroff.sh", "3"]
 trust:
  org:
    - linuxkit