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authorKeith Busch <keith.busch@intel.com>2017-02-11 02:15:51 +0300
committerJens Axboe <axboe@fb.com>2017-02-22 23:34:00 +0300
commitf33447b90e96076483525b21cc4e0a8977cdd07c (patch)
tree74e19e4239a9e1b3191ea3693c17aaddc4f03c42 /drivers/nvme
parent6db28eda266052f86a6b402422de61eeb7d2e351 (diff)
downloadlinux-f33447b90e96076483525b21cc4e0a8977cdd07c.tar.xz
nvme/core: Fix race kicking freed request_queue
If a namespace has already been marked dead, we don't want to kick the request_queue again since we may have just freed it from another thread. Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 849e85847ad4..25ec4e585220 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2333,9 +2333,9 @@ void nvme_kill_queues(struct nvme_ctrl *ctrl)
* Revalidating a dead namespace sets capacity to 0. This will
* end buffered writers dirtying pages that can't be synced.
*/
- if (ns->disk && !test_and_set_bit(NVME_NS_DEAD, &ns->flags))
- revalidate_disk(ns->disk);
-
+ if (!ns->disk || test_and_set_bit(NVME_NS_DEAD, &ns->flags))
+ continue;
+ revalidate_disk(ns->disk);
blk_set_queue_dying(ns->queue);
blk_mq_abort_requeue_list(ns->queue);
blk_mq_start_stopped_hw_queues(ns->queue, true);