diff mbox series

[5.12,35/48] nvme-loop: reset queue count to 1 in nvme_loop_destroy_io_queues()

Message ID 20210616152837.757318393@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH June 16, 2021, 3:33 p.m. UTC 
From: Hannes Reinecke <hare@suse.de>

[ Upstream commit a6c144f3d2e230f2b3ac5ed8c51e0f0391556197 ]

The queue count is increased in nvme_loop_init_io_queues(), so we
need to reset it to 1 at the end of nvme_loop_destroy_io_queues().
Otherwise the function is not re-entrant safe, and crash will happen
during concurrent reset and remove calls.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/nvme/target/loop.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 14913a4588ec..4b2a6330feb5 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -297,6 +297,7 @@  static void nvme_loop_destroy_io_queues(struct nvme_loop_ctrl *ctrl)
 		clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[i].flags);
 		nvmet_sq_destroy(&ctrl->queues[i].nvme_sq);
 	}
+	ctrl->ctrl.queue_count = 1;
 }
 
 static int nvme_loop_init_io_queues(struct nvme_loop_ctrl *ctrl)