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40 lines
1.6 KiB
Diff
40 lines
1.6 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Tue, 9 Mar 2021 09:42:15 +0100
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Subject: [PATCH 12/20] PCI: hv: Use tasklet_disable_in_atomic()
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The hv_compose_msi_msg() callback in irq_chip::irq_compose_msi_msg is
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invoked via irq_chip_compose_msi_msg(), which itself is always invoked from
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atomic contexts from the guts of the interrupt core code.
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There is no way to change this w/o rewriting the whole driver, so use
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tasklet_disable_in_atomic() which allows to make tasklet_disable()
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sleepable once the remaining atomic users are addressed.
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: "K. Y. Srinivasan" <kys@microsoft.com>
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Cc: Haiyang Zhang <haiyangz@microsoft.com>
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Cc: Stephen Hemminger <sthemmin@microsoft.com>
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Cc: Wei Liu <wei.liu@kernel.org>
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Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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Cc: Rob Herring <robh@kernel.org>
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Cc: Bjorn Helgaas <bhelgaas@google.com>
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Cc: linux-hyperv@vger.kernel.org
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Cc: linux-pci@vger.kernel.org
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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drivers/pci/controller/pci-hyperv.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/pci/controller/pci-hyperv.c
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+++ b/drivers/pci/controller/pci-hyperv.c
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@@ -1458,7 +1458,7 @@ static void hv_compose_msi_msg(struct ir
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* Prevents hv_pci_onchannelcallback() from running concurrently
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* in the tasklet.
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*/
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- tasklet_disable(&channel->callback_event);
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+ tasklet_disable_in_atomic(&channel->callback_event);
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/*
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* Since this function is called with IRQ locks held, can't
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