[PATCH 5.9 110/255] nvme-rdma: avoid repeated request completion

Greg Kroah-Hartman
2020-11-17T13:35:34Z

From: Sagi Grimberg <sagi@grimberg.me>

[ Upstream commit fdf58e02adecbef4c7cbb2073d8ea225e6fd5f26 ]

The request may be executed asynchronously, and rq->state may be
changed to IDLE. To avoid repeated request completion, only
MQ_RQ_COMPLETE of rq->state is checked in nvme_rdma_complete_timed_out.
It is not safe, so need adding check IDLE for rq->state.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/rdma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 73961cc1e9799..f91c20e3daf7b 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1974,7 +1974,7 @@ static void nvme_rdma_complete_timed_out(struct request *rq)
struct nvme_rdma_queue *queue = req->queue;

nvme_rdma_stop_queue(queue);
- if (!blk_mq_request_completed(rq)) {
+ if (blk_mq_request_started(rq) && !blk_mq_request_completed(rq)) {
nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD;
blk_mq_complete_request(rq);
}
--
2.27.0