ubd: fix missing lock around request issue

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We need to hold the device lock (and disable interrupts) while
writing new commands, or we could be interrupted while that
is happening and read invalid requests in the completion path.

Fixes: 4e6da0fe80 ("um: Convert ubd driver to blk-mq")
Tested-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2018-11-07 14:34:05 -07:00

parent df376b2ed5

commit 6961cd4d0f

1 changed files with 7 additions and 2 deletions

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arch/um/drivers/ubd_kern.c

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