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blk-mq: Fix NULL pointer updating nr_requests
author
Keith Busch
<keith.busch@intel.com>
Thu, 18 Feb 2016 21:56:35 +0000
(14:56 -0700)
committer
Jens Axboe
<axboe@fb.com>
Thu, 3 Mar 2016 21:46:04 +0000
(14:46 -0700)
A h/w context's tags are freed if it was not assigned a CPU. Check if
the context has tags before updating the depth.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-mq.c
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diff --git
a/block/blk-mq.c
b/block/blk-mq.c
index f539a53d16c370bdc91c9434719cad808de152ad..5667f59c277c5052dca7a4e4e4d643d8c06cfa5f 100644
(file)
--- a/
block/blk-mq.c
+++ b/
block/blk-mq.c
@@
-2336,6
+2336,8
@@
int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
ret = 0;
queue_for_each_hw_ctx(q, hctx, i) {
+ if (!hctx->tags)
+ continue;
ret = blk_mq_tag_update_depth(hctx->tags, nr);
if (ret)
break;