Commit 0067d4b0 authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Jens Axboe

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: default avatarYi Zhang <>
Signed-off-by: default avatarSagi Grimberg <>
Signed-off-by: default avatarJens Axboe <>
parent f5fe1b51
......@@ -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)
for (j = 0; j < tags->nr_tags; j++) {
if (!tags->static_rqs[j])
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