From: Hannes Reinecke hare@suse.de
stable inclusion from linux-4.19.196 commit 9ccbe18eb48a9b27b646931e01d84dfe0bc8a10d
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[ Upstream commit 4237de2f73a669e4f89ac0aa2b44fb1a1d9ec583 ]
We need to check the NVME_LOOP_Q_LIVE flag in nvme_loop_destroy_admin_queue() to protect against duplicate invocations eg 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 Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/nvme/target/loop.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index b0bf40e5c00b5..ffe7fa814d8c8 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -274,7 +274,8 @@ static const struct blk_mq_ops nvme_loop_admin_mq_ops = {
static void nvme_loop_destroy_admin_queue(struct nvme_loop_ctrl *ctrl) { - clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[0].flags); + if (!test_and_clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[0].flags)) + return; nvmet_sq_destroy(&ctrl->queues[0].nvme_sq); blk_cleanup_queue(ctrl->ctrl.admin_q); blk_mq_free_tag_set(&ctrl->admin_tag_set);