nvmet: Disable keep-alive timer when kato is cleared to 0h

[ Upstream commit 0d3b6a8d213a30387b5104b2fb25376d18636f23 ]

Based on nvme spec, when keep alive timeout is set to zero
the keep-alive timer should be disabled.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 57a4062cbb59ea4f8958a0f30963556c0cb7fa3e..7d7176369edf706dc2ecac8d3090d1e52bad0ffd 100644 (file)
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -369,6 +369,9 @@ static void nvmet_keep_alive_timer(struct work_struct *work)
 
 static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl)
 {
+       if (unlikely(ctrl->kato == 0))
+               return;
+
        pr_debug("ctrl %d start keep-alive timer for %d secs\n",
                ctrl->cntlid, ctrl->kato);
 
@@ -378,6 +381,9 @@ static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl)
 
 static void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl)
 {
+       if (unlikely(ctrl->kato == 0))
+               return;
+
        pr_debug("ctrl %d stop keep-alive\n", ctrl->cntlid);
 
        cancel_delayed_work_sync(&ctrl->ka_work);