block: free q->flush_rq in blk_init_allocated_queue error paths
Commit 7982e90c ("block: fix q->flush_rq NULL pointer crash on dm-mpath flush") moved an allocation to blk_init_allocated_queue(), but neglected to free that allocation on the error paths that follow. Signed-off-by: NDave Jones <davej@fedoraproject.org> Acked-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NJens Axboe <axboe@fb.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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