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author | Mark Brown <broonie@kernel.org> | 2014-09-18 10:49:28 -0700 |
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committer | Mark Brown <broonie@kernel.org> | 2014-09-18 10:49:28 -0700 |
commit | d831fd1b46d04e5c8c8a0431c321578d25852695 (patch) | |
tree | 53a685712d0f0debe66de80c1f0a5e545d0de7e2 /block | |
parent | c95c4e2a6bb8d44f9a8f59eadd99a9a615c53112 (diff) | |
parent | 339f8f37f0203884332585e38c06536c8477d475 (diff) |
Merge tag 'v3.10.55' into linux-linaro-lsklsk-v3.10-14.09
This is the 3.10.55 stable release
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-cgroup.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index b95219d2168d..1ff8e97f853a 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -883,6 +883,13 @@ void blkcg_drain_queue(struct request_queue *q) if (!q->root_blkg) return; + /* + * @q could be exiting and already have destroyed all blkgs as + * indicated by NULL root_blkg. If so, don't confuse policies. + */ + if (!q->root_blkg) + return; + blk_throtl_drain(q); } |