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nvme-pci: skip nvme_write_sq_db on empty rqlist

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[ Upstream commit 288ff0d10b ]

nvme_submit_cmds() should check the rqlist before calling
nvme_write_sq_db(); if the list is empty, it must return immediately.

Fixes: beadf00885 ("nvme-pci: reverse request order in nvme_queue_rqs")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maurizio Lombardi
2025-03-31 18:28:59 +02:00
committed by Greg Kroah-Hartman
parent 63371be47f
commit 87bbcb73d6
1 changed files with 3 additions and 0 deletions
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3
drivers/nvme/host/pci.c
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@@ -989,6 +989,9 @@ static void nvme_submit_cmds(struct nvme_queue *nvmeq, struct rq_list *rqlist)
{
struct request *req;
if (rq_list_empty(rqlist))
return;
spin_lock(&nvmeq->sq_lock);
while ((req = rq_list_pop(rqlist))) {
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);