nvme-pci: add trouble shooting steps for timeouts

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Many users have encountered IO timeouts with a CSTS value of 0xffffffff,
which indicates a failure to read the register. While there are various
potential causes for this observation, faulty NVMe APST has been the
culprit quite frequently. Add the recommended troubleshooting steps in
the error output when this condition occurs.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Keith Busch 2022-06-06 09:53:17 -07:00 • committed by Christoph Hellwig

parent 2f0dad1719

commit 4641a8e6e1

1 changed files with 8 additions and 0 deletions

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drivers/nvme/host/pci.c

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