]> git.baikalelectronics.ru Git - kernel.git/commit
blk-mq: Keep set->nr_hw_queues and set->map[].nr_queues in sync
authorBart Van Assche <bvanassche@acm.org>
Tue, 10 Mar 2020 04:26:17 +0000 (21:26 -0700)
committerJens Axboe <axboe@kernel.dk>
Tue, 10 Mar 2020 13:09:59 +0000 (07:09 -0600)
commit6e66b49392419f3fe134e1be583323ef75da1e4b
tree16261ca2fe6e6f478627d763f688a410af47c760
parent2dd209f00fc5a1caafa493066c7cd692fd2fd57c
blk-mq: Keep set->nr_hw_queues and set->map[].nr_queues in sync

blk_mq_map_queues() and multiple .map_queues() implementations expect that
set->map[HCTX_TYPE_DEFAULT].nr_queues is set to the number of hardware
queues. Hence set .nr_queues before calling these functions. This patch
fixes the following kernel warning:

WARNING: CPU: 0 PID: 2501 at include/linux/cpumask.h:137
Call Trace:
 blk_mq_run_hw_queue+0x19d/0x350 block/blk-mq.c:1508
 blk_mq_run_hw_queues+0x112/0x1a0 block/blk-mq.c:1525
 blk_mq_requeue_work+0x502/0x780 block/blk-mq.c:775
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255

Fixes: ed76e329d74a ("blk-mq: abstract out queue map") # v5.0
Reported-by: syzbot+d44e1b26ce5c3e77458d@syzkaller.appspotmail.com
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-mq.c