Commit 6b55e1f2 authored Sep 19, 2014 by Jens Axboe

blk-mq: fix potential oops on out-of-memory in __blk_mq_alloc_rq_maps()



__blk_mq_alloc_rq_maps() can be invoked multiple times, if we scale
back the queue depth if we are low on memory. So don't clear
set->tags when we fail, this is handled directly in
the parent function, blk_mq_alloc_tag_set().

Reported-by: Robert Elliott <Elliott@hp.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent a57a178a

block/blk-mq.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -1959,7 +1959,6 @@ out_unwind:
		while (--i >= 0)
		blk_mq_free_rq_map(set, set->tags[i], i);

		set->tags = NULL;
		return -ENOMEM;
		}