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authorJens Axboe <jaxboe@fusionio.com>2011-03-07 08:59:06 +0100
committerJens Axboe <jaxboe@fusionio.com>2011-03-07 08:59:06 +0100
commit93803e0140c6216b68fe926ccc611297120da273 (patch)
treec70e354f3029a00f83293b0d6bedf6738437ebab /block/cfq-iosched.c
parentda527770007fce8e4541947d47918248286da875 (diff)
downloadop-kernel-dev-93803e0140c6216b68fe926ccc611297120da273.zip
op-kernel-dev-93803e0140c6216b68fe926ccc611297120da273.tar.gz
cfq-iosched: fix race in cfq_set_request()
We need to hold the queue lock over the reference increment, it's not atomic anymore. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 3202c7e..fb2141e 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3675,12 +3675,11 @@ new_queue:
cfqq->allocated[rw]++;
- spin_unlock_irqrestore(q->queue_lock, flags);
-
cfqq->ref++;
rq->elevator_private[0] = cic;
rq->elevator_private[1] = cfqq;
rq->elevator_private[2] = cfq_ref_get_cfqg(cfqq->cfqg);
+ spin_unlock_irqrestore(q->queue_lock, flags);
return 0;
queue_fail:
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