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authorMing Lin <ming.l@samsung.com>2016-05-25 23:23:27 -0700
committerJens Axboe <axboe@fb.com>2016-05-26 08:51:43 -0600
commitc7de5726307620711a4753b2a13d9e5daecc1081 (patch)
treecbc8b1c52c7afc1e6f77490956b514aab95f1a2e /block
parent4d1034eb7c2f5e32d48ddc4dfce0f1a723d28667 (diff)
downloadop-kernel-dev-c7de5726307620711a4753b2a13d9e5daecc1081.zip
op-kernel-dev-c7de5726307620711a4753b2a13d9e5daecc1081.tar.gz
blk-mq: clear q->mq_ops if init fail
blk_mq_init_queue() calls blk_mq_init_allocated_queue(), but q->mq_ops was not cleared when blk_mq_init_allocated_queue() fails. Then blk_cleanup_queue() calls blk_mq_free_queue() which will crash because: - q->all_q_node is not added to all_q_list yet - q->tag_set is NULL - hctx was not setup yet or already freed Fixed it by clearing q->mq_ops on error path. Signed-off-by: Ming Lin <ming.l@samsung.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 7df9c92..29cbc1b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2020,7 +2020,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
q->queue_ctx = alloc_percpu(struct blk_mq_ctx);
if (!q->queue_ctx)
- return ERR_PTR(-ENOMEM);
+ goto err_exit;
q->queue_hw_ctx = kzalloc_node(nr_cpu_ids * sizeof(*(q->queue_hw_ctx)),
GFP_KERNEL, set->numa_node);
@@ -2084,6 +2084,8 @@ err_map:
kfree(q->queue_hw_ctx);
err_percpu:
free_percpu(q->queue_ctx);
+err_exit:
+ q->mq_ops = NULL;
return ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL(blk_mq_init_allocated_queue);
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