diff --git a/kernel/patches/0003-serial-forbid-8250-on-s390.patch b/kernel/patches/0003-serial-forbid-8250-on-s390.patch new file mode 100644 index 000000000..53254fe47 --- /dev/null +++ b/kernel/patches/0003-serial-forbid-8250-on-s390.patch @@ -0,0 +1,35 @@ +From 897514eadc2dd1b7cb71099b0495752bdf21390d Mon Sep 17 00:00:00 2001 +From: Christian Borntraeger +Date: Tue, 12 Dec 2017 09:08:35 +0100 +Subject: [PATCH 19/21] serial: forbid 8250 on s390 + +Using "make kvmconfig" results in a potentially unusable linux image +on s390. The reason is that both the (default on s390) sclp consoles +as well as the 8250 console register a ttyS as console. Since there +will be no 8250 on s390 let's fence 8250. This will ensure that there +is always a working sclp console. + +Reported-by: Alice Frosi +Signed-off-by: Christian Borntraeger +Reviewed-by: Hendrik Brueckner +Signed-off-by: Greg Kroah-Hartman +(cherry picked from commit 1598e38c0770b08c4d6371b670f9ee61a42ec68b) +--- + drivers/tty/serial/8250/Kconfig | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig +index a5c0ef1e7695..16b1496e6105 100644 +--- a/drivers/tty/serial/8250/Kconfig ++++ b/drivers/tty/serial/8250/Kconfig +@@ -5,6 +5,7 @@ + + config SERIAL_8250 + tristate "8250/16550 and compatible serial support" ++ depends on !S390 + select SERIAL_CORE + ---help--- + This selects whether you want to include the driver for the standard +-- +2.18.0 +