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nvme: move init of keep_alive work item to controller initialization

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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>
This commit is contained in:
James Smart 2018-06-12 16:28:24 -07:00 committed by Christoph Hellwig
parent 40c6f9c28e
commit 230f1f9e04
1 changed files with 4 additions and 3 deletions
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7
drivers/nvme/host/core.c
View file

@ -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;