[PATCH AUTOSEL 5.4 20/29] nvme-loop: reset queue count to 1 in nvme_loop_destroy_io_queues()
From: Sasha Levin <sashal@kernel.org>
Date: 2021-06-07 16:20:22
Also in:
linux-nvme, lkml
Subsystem:
nvm express target driver, the rest · Maintainers:
Christoph Hellwig, Sagi Grimberg, Chaitanya Kulkarni, Linus Torvalds
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 <redacted> 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 --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 82b87a4c50f6..b4f5503ae570 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c@@ -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)
--
2.30.2