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| author | Sagi Grimberg <sagi@grimberg.me> | 2017-03-13 16:10:11 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-03-13 08:14:23 -0600 |
| commit | 0067d4b020ea07a58540acb2c5fcd3364bf326e0 (patch) | |
| tree | 9e2e1375e8db4eb35eb7419b33c5f8cde51afefc | |
| parent | f5fe1b51905df7cfe4fdfd85c5fb7bc5b71a094f (diff) | |
| download | blackbird-op-linux-0067d4b020ea07a58540acb2c5fcd3364bf326e0.tar.gz blackbird-op-linux-0067d4b020ea07a58540acb2c5fcd3364bf326e0.zip | |
blk-mq: Fix tagset reinit in the presence of cpu hot-unplug
In case cpu was unplugged, we need to make sure not to assume
that the tags for that cpu are still allocated. so check
for null tags when reinitializing a tagset.
Reported-by: Yi Zhang <yizhan@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-mq-tag.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index e48bc2c72615..9d97bfc4d465 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -295,6 +295,9 @@ int blk_mq_reinit_tagset(struct blk_mq_tag_set *set) for (i = 0; i < set->nr_hw_queues; i++) { struct blk_mq_tags *tags = set->tags[i]; + if (!tags) + continue; + for (j = 0; j < tags->nr_tags; j++) { if (!tags->static_rqs[j]) continue; |
