[PATCH 4.17 074/324] nvmet: reset keep alive timer in controller enable

[Greg Kroah-Hartman]

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Max Gurtuvoy <maxg@xxxxxxxxxxxx>

[ Upstream commit d68a90e148f5a82aa67654c5012071e31c0e4baa ]

Controllers that are not yet enabled should not really enforce keep alive
timeouts, but we still want to track a timeout and cleanup in case a host
died before it enabled the controller.  Hence, simply reset the keep
alive timer when the controller is enabled.

Suggested-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/nvme/target/core.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -624,6 +624,14 @@ static void nvmet_start_ctrl(struct nvme
 	}
 
 	ctrl->csts = NVME_CSTS_RDY;
+
+	/*
+	 * Controllers that are not yet enabled should not really enforce the
+	 * keep alive timeout, but we still want to track a timeout and cleanup
+	 * in case a host died before it enabled the controller.  Hence, simply
+	 * reset the keep alive timer when the controller is enabled.
+	 */
+	mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ);
 }
 
 static void nvmet_clear_ctrl(struct nvmet_ctrl *ctrl)