[PATCH] radeon: Use time_before()

[PATCH] radeon: Use time_before()

[Manuel Schölling]

To be future-proof and for better readability the time comparisons are modified
to use time_before() instead of plain, error-prone math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
---
 drivers/gpu/drm/radeon/radeon_pm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index f30b842..b08db66 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -1592,7 +1592,7 @@ static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 		 * to false since we want to wait for vbl to avoid flicker.
 		 */
 		if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
-		    jiffies > rdev->pm.dynpm_action_timeout) {
+		    time_before(rdev->pm.dynpm_action_timeout, jiffies)) {
 			radeon_pm_get_dynpm_state(rdev);
 			radeon_pm_set_clocks(rdev);
 		}
-- 
1.7.10.4

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Re: [PATCH] radeon: Use time_before()

[Thierry Reding]

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On Wed, May 21, 2014 at 07:39:37PM +0200, Manuel Schölling wrote:
> To be future-proof and for better readability the time comparisons are modified
> to use time_before() instead of plain, error-prone math.

Nit: commit messages are best wrapped around column 72.

> Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
> ---
>  drivers/gpu/drm/radeon/radeon_pm.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
> index f30b842..b08db66 100644
> --- a/drivers/gpu/drm/radeon/radeon_pm.c
> +++ b/drivers/gpu/drm/radeon/radeon_pm.c
> @@ -1592,7 +1592,7 @@ static void radeon_dynpm_idle_work_handler(struct work_struct *work)
>  		 * to false since we want to wait for vbl to avoid flicker.
>  		 */
>  		if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
> -		    jiffies > rdev->pm.dynpm_action_timeout) {
> +		    time_before(rdev->pm.dynpm_action_timeout, jiffies)) {
>  			radeon_pm_get_dynpm_state(rdev);
>  			radeon_pm_set_clocks(rdev);
>  		}

I think time_after(jiffies, rdev->pm.dynpm_action_timeout) would be more
intuitive, but either way:

Reviewed-by: Thierry Reding <treding@nvidia.com>

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