[PATCH 4.9 030/130] nvmet: reset keep alive timer in controller enable

From: Greg Kroah-Hartman
Date: Thu Aug 23 2018 - 04:08:49 EST


4.9-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
@@ -578,6 +578,14 @@ 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)