Revert "nvme-pci: remove last_sq_tail"

Browse source

Multiple CPUs may be mapped to the same hctx, allowing mulitple
submission contexts to attempt commit_rqs(). We need to verify we're
not writing the same doorbell value multiple times since that's a spec
violation.

Revert commit 54b2fcee1d.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1878596
Reported-by: "B.L. Jones" <brandon.gustav@googlemail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

...

This commit is contained in:

Keith Busch 2020-10-30 10:28:54 -07:00 • committed by Christoph Hellwig

parent 65ff5cd045

commit 38210800bf

1 changed files with 19 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

drivers/nvme/host/pci.c

View file