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nvme-loop: reset queue count to 1 in nvme_loop_destroy_io_queues()

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[ 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>
This commit is contained in:
Hannes Reinecke 2021-05-26 17:23:15 +02:00 committed by Greg Kroah-Hartman
parent 31ac553111
commit ed4bee6e1b
1 changed files with 1 additions and 0 deletions
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drivers/nvme/target/loop.c
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@ -288,6 +288,7 @@ 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)