nvme: add quirk to force medium priority for SQ creation

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commit 9abd68ef45 upstream.

Some P3100 drives have a bug where they think WRRU (weighted round robin)
is always enabled, even though the host doesn't set it. Since they think
it's enabled, they also look at the submission queue creation priority. We
used to set that to MEDIUM by default, but that was removed in commit
81c1cd9835. This causes various issues on that drive. Add a quirk to
still set MEDIUM priority for that controller.

Fixes: 81c1cd9835 ("nvme/pci: Don't set reserved SQ create flags")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Jens Axboe 2018-05-08 10:25:15 -06:00 • committed by Greg Kroah-Hartman

parent db433f83a8

commit 57e2ce8bba

2 changed files with 16 additions and 1 deletions

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5

drivers/nvme/host/nvme.h

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12

drivers/nvme/host/pci.c

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