diff options
| author | David S. Miller <davem@davemloft.net> | 2012-11-10 18:32:51 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-10 18:32:51 -0500 |
| commit | d4185bbf62a5d8d777ee445db1581beb17882a07 (patch) | |
| tree | 024b0badbd7c970b1983be6d8c345cc4a290cb31 /block/blk-cgroup.c | |
| parent | c075b13098b399dc565b4d53f42047a8d40ed3ba (diff) | |
| parent | a375413311b39005ef281bfd71ae8f4e3df22e97 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
Minor conflict between the BCM_CNIC define removal in net-next
and a bug fix added to net. Based upon a conflict resolution
patch posted by Stephen Rothwell.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'block/blk-cgroup.c')
| -rw-r--r-- | block/blk-cgroup.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index cafcd743118..d0b770391ad 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -285,6 +285,13 @@ static void blkg_destroy_all(struct request_queue *q) blkg_destroy(blkg); spin_unlock(&blkcg->lock); } + + /* + * root blkg is destroyed. Just clear the pointer since + * root_rl does not take reference on root blkg. + */ + q->root_blkg = NULL; + q->root_rl.blkg = NULL; } static void blkg_rcu_free(struct rcu_head *rcu_head) @@ -326,6 +333,9 @@ struct request_list *__blk_queue_next_rl(struct request_list *rl, */ if (rl == &q->root_rl) { ent = &q->blkg_list; + /* There are no more block groups, hence no request lists */ + if (list_empty(ent)) + return NULL; } else { blkg = container_of(rl, struct blkcg_gq, rl); ent = &blkg->q_node; |