[PATCH] nvme-pci: add trouble shooting steps for timeouts

[Chaitanya Kulkarni]

On 6/6/22 09:53, Keith Busch wrote:
> From: Keith Busch <kbusch at kernel.org>
> 
> 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 at kernel.org>
> ---

I've seen these reports with CSTS == 0xffffffff many times,
looks good, this should help...

Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>

-ck