blk-mq: don't leak preempt counter/q_usage_counter when allocating rq failed

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When blk_mq_get_request() failed, preempt counter isn't
released, and blk_mq_make_request() doesn't release the counter
too.

This patch fixes the issue, and makes sure that preempt counter
is only held if rq is allocated successfully. The same policy is
applied on .q_usage_counter too.

Signed-off-by: Ming Lei <minlei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Ming Lei 2017-08-02 08:01:45 +08:00 • committed by Jens Axboe

parent 46d556e6aa

commit 1ad43c0078

1 changed files with 11 additions and 6 deletions

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block/blk-mq.c

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