nvme/pci: move cqe check after device shutdown

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[ Upstream commit fa46c6fb5d ]

Many users have reported nvme triggered irq_startup() warnings during
shutdown. The driver uses the nvme queue's irq to synchronize scanning
for completions, and enabling an interrupt affined to only offline CPUs
triggers the alarming warning.

Move the final CQE check to after disabling the device and all
registered interrupts have been torn down so that we do not have any
IRQ to synchronize.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206509
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Keith Busch 2020-02-13 01:41:05 +09:00 • committed by Greg Kroah-Hartman

parent 4b68fd306e

commit ba7d6a9f7f

1 changed files with 18 additions and 5 deletions

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drivers/nvme/host/pci.c

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