Re: [PATCH 3/7] PM / QoS: Prepare struct dev_pm_qos_request for more request types

mark gross
2012-10-10T03:38:07Z

On Mon, Oct 08, 2012 at 10:06:08AM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> The subsequent patches will use struct dev_pm_qos_request for
> representing both latency requests and flags requests. To make that
> easier, put the node member of struct dev_pm_qos_request (under the
> name "pnode") into a union called "data" that will represent the
> request's value and list node depending on its type.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Reviewed-by: Jean Pihet <j-pihet@ti.com>
> ---
> drivers/base/power/qos.c | 6 +++---
> drivers/base/power/sysfs.c | 2 +-
> include/linux/pm_qos.h | 4 +++-
> 3 files changed, 7 insertions(+), 5 deletions(-)
>
> Index: linux/include/linux/pm_qos.h
> ===================================================================
> --- linux.orig/include/linux/pm_qos.h
> +++ linux/include/linux/pm_qos.h
> @@ -39,7 +39,9 @@ struct pm_qos_flags_request {
> };
>
> struct dev_pm_qos_request {
> - struct plist_node node;
> + union {
> + struct plist_node pnode;
> + } data;
> struct device *dev;
> };
>
> Index: linux/drivers/base/power/sysfs.c
> ===================================================================
> --- linux.orig/drivers/base/power/sysfs.c
> +++ linux/drivers/base/power/sysfs.c
> @@ -221,7 +221,7 @@ static DEVICE_ATTR(autosuspend_delay_ms,
> static ssize_t pm_qos_latency_show(struct device *dev,
> struct device_attribute *attr, char *buf)
> {
> - return sprintf(buf, "%d\n", dev->power.pq_req->node.prio);
> + return sprintf(buf, "%d\n", dev->power.pq_req->data.pnode.prio);
> }
>
> static ssize_t pm_qos_latency_store(struct device *dev,
> Index: linux/drivers/base/power/qos.c
> ===================================================================
> --- linux.orig/drivers/base/power/qos.c
> +++ linux/drivers/base/power/qos.c
> @@ -90,7 +90,7 @@ static int apply_constraint(struct dev_p
> int ret, curr_value;
>
> ret = pm_qos_update_target(&req->dev->power.qos->latency,
> - &req->node, action, value);
> + &req->data.pnode, action, value);
>
> if (ret) {
> /* Call the global callbacks if needed */
> @@ -183,7 +183,7 @@ void dev_pm_qos_constraints_destroy(stru
>
> c = &qos->latency;
> /* Flush the constraints list for the device */
> - plist_for_each_entry_safe(req, tmp, &c->list, node) {
> + plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) {
> /*
> * Update constraints list and call the notification
> * callbacks if needed
> @@ -293,7 +293,7 @@ int dev_pm_qos_update_request(struct dev
> mutex_lock(&dev_pm_qos_mtx);
>
> if (req->dev->power.qos) {
> - if (new_value != req->node.prio)
> + if (new_value != req->data.pnode.prio)
> ret = apply_constraint(req, PM_QOS_UPDATE_REQ,
> new_value);
> } else {
>
Reviewed-by: mark gross <markgross@thegnar.org>