nvme: move init of keep_alive work item to controller initialization

Currently, the code initializes the keep alive work item whenever
nvme_start_keep_alive() is called. However, this routine is called
several times while reconnecting, etc. Although it's hoped that keep
alive is always disabled and not scheduled when start is called,
re-initing if it were scheduled or completing can have very bad
side effects. There's no need for re-initialization.

Move the keep_alive work item and cmd struct initialization to
controller init.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 46df030..e541fe2 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -848,9 +848,6 @@ static void nvme_start_keep_alive(struct nvme_ctrl *ctrl)
        if (unlikely(ctrl->kato == 0))
                return;
 
-       INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work);
-       memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd));
-       ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive;
        schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ);
 }
 
@@ -3484,6 +3481,10 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
        INIT_WORK(&ctrl->fw_act_work, nvme_fw_act_work);
        INIT_WORK(&ctrl->delete_work, nvme_delete_ctrl_work);
 
+       INIT_DELAYED_WORK(&ctrl->ka_work, nvme_keep_alive_work);
+       memset(&ctrl->ka_cmd, 0, sizeof(ctrl->ka_cmd));
+       ctrl->ka_cmd.common.opcode = nvme_admin_keep_alive;
+
        ret = ida_simple_get(&nvme_instance_ida, 0, 0, GFP_KERNEL);
        if (ret < 0)
                goto out;