tree 86146d83d19701e535012a589223db27329fee06
parent bcc7f5b4bee8e327689a4d994022765855c807ff
author Andy Lutomirski <luto@kernel.org> 1480738455 -0700
committer Jens Axboe <axboe@fb.com> 1481688428 -0700

nvme/pci: Log PCI_STATUS when the controller dies

When debugging nvme controller crashes, it's nice to know whether
the controller died cleanly so that the failure is just reflected in
CSTS, it died and put an error in PCI_STATUS, or whether it died so
badly that it stopped responding to PCI configuration space reads.

I've seen a failure that gives 0xffff in PCI_STATUS on a Samsung
"SM951 NVMe SAMSUNG 256GB" with firmware "BXW75D0Q".

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Keith Busch <keith.busch@intel.com>

Fixed up white space and hunk reject.

Signed-off-by: Jens Axboe <axboe@fb.com>