2015-02-04 21:01:11

by SF Markus Elfring

Subject: [PATCH] GPU-DRM-Exynos: Delete unnecessary checks before two function calls

From: Markus Elfring <[email protected]>
Date: Wed, 4 Feb 2015 21:54:45 +0100

The functions phy_power_on() and vunmap() perform also input
parameter validation. Thus the test around their calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <[email protected]>
---
drivers/gpu/drm/exynos/exynos_dp_core.c | 6 ++----
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 +-
2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 34d46aa..306cf1d 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -1057,14 +1057,12 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,

static void exynos_dp_phy_init(struct exynos_dp_device *dp)
{
- if (dp->phy)
- phy_power_on(dp->phy);
+ phy_power_on(dp->phy);
}

static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
{
- if (dp->phy)
- phy_power_off(dp->phy);
+ phy_power_off(dp->phy);
}

static void exynos_dp_poweron(struct exynos_drm_display *display)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index e12ea90..0dd448a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -313,7 +313,7 @@ static void exynos_drm_fbdev_destroy(struct drm_device *dev,
struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj;
struct drm_framebuffer *fb;

- if (is_drm_iommu_supported(dev) && exynos_gem_obj->buffer->kvaddr)
+ if (is_drm_iommu_supported(dev))
vunmap(exynos_gem_obj->buffer->kvaddr);

/* release drm framebuffer and real buffer */
--
2.2.2

2015-02-05 08:29:04

by Joonyoung Shim

Subject: Re: [PATCH] GPU-DRM-Exynos: Delete unnecessary checks before two function calls

Hi,

On 02/05/2015 06:00 AM, SF Markus Elfring wrote:
> From: Markus Elfring <[email protected]>
> Date: Wed, 4 Feb 2015 21:54:45 +0100
>
> The functions phy_power_on() and vunmap() perform also input
> parameter validation. Thus the test around their calls is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <[email protected]>
> ---
> drivers/gpu/drm/exynos/exynos_dp_core.c | 6 ++----
> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 +-
> 2 files changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
> index 34d46aa..306cf1d 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp_core.c
> +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
> @@ -1057,14 +1057,12 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
>
> static void exynos_dp_phy_init(struct exynos_dp_device *dp)
> {
> - if (dp->phy)
> - phy_power_on(dp->phy);
> + phy_power_on(dp->phy);
> }
>
> static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
> {
> - if (dp->phy)
> - phy_power_off(dp->phy);
> + phy_power_off(dp->phy);
> }
>
> static void exynos_dp_poweron(struct exynos_drm_display *display)
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> index e12ea90..0dd448a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
> @@ -313,7 +313,7 @@ static void exynos_drm_fbdev_destroy(struct drm_device *dev,
> struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj;
> struct drm_framebuffer *fb;
>
> - if (is_drm_iommu_supported(dev) && exynos_gem_obj->buffer->kvaddr)
> + if (is_drm_iommu_supported(dev))
> vunmap(exynos_gem_obj->buffer->kvaddr);
>
> /* release drm framebuffer and real buffer */
>

Acked-by: Joonyoung Shim <[email protected]>

Thanks.

2015-06-27 17:18:03

by SF Markus Elfring

Subject: Re: [PATCH] GPU-DRM-Exynos: Delete unnecessary checks before two function calls

>> From: Markus Elfring <[email protected]>
>> Date: Wed, 4 Feb 2015 21:54:45 +0100
>>
>> The functions phy_power_on() and vunmap() perform also input
>> parameter validation. Thus the test around their calls is not needed.
>>
>> This issue was detected by using the Coccinelle software.
>>
>> Signed-off-by: Markus Elfring <[email protected]>
>> ---
>> drivers/gpu/drm/exynos/exynos_dp_core.c | 6 ++----
>> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 +-
>> 2 files changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
>> index 34d46aa..306cf1d 100644
>> --- a/drivers/gpu/drm/exynos/exynos_dp_core.c
>> +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
>> @@ -1057,14 +1057,12 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
>>
>> static void exynos_dp_phy_init(struct exynos_dp_device *dp)
>> {
>> - if (dp->phy)
>> - phy_power_on(dp->phy);
>> + phy_power_on(dp->phy);
>> }
>>
>> static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
>> {
>> - if (dp->phy)
>> - phy_power_off(dp->phy);
>> + phy_power_off(dp->phy);
>> }
>>
>> static void exynos_dp_poweron(struct exynos_drm_display *display)
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> index e12ea90..0dd448a 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> @@ -313,7 +313,7 @@ static void exynos_drm_fbdev_destroy(struct drm_device *dev,
>> struct exynos_drm_gem_obj *exynos_gem_obj = exynos_fbd->exynos_gem_obj;
>> struct drm_framebuffer *fb;
>>
>> - if (is_drm_iommu_supported(dev) && exynos_gem_obj->buffer->kvaddr)
>> + if (is_drm_iommu_supported(dev))
>> vunmap(exynos_gem_obj->buffer->kvaddr);
>>
>> /* release drm framebuffer and real buffer */
>>
>
> Acked-by: Joonyoung Shim <[email protected]>

Do the chances increase to integrate this update suggestion
into another source code repository?

Regards,
Markus