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

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Date:	Sat, 27 Jun 2015 19:17:35 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	David Airlie <airlied@...ux.ie>, Inki Dae <inki.dae@...sung.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
CC:	Joonyoung Shim <jy0922.shim@...sung.com>,
	Julia Lawall <julia.lawall@...6.fr>,
	kernel-janitors@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] GPU-DRM-Exynos: Delete unnecessary checks before two
 function calls

>> From: Markus Elfring <elfring@...rs.sourceforge.net>
>> 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 <elfring@...rs.sourceforge.net>
>> ---
>>  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 <jy0922.shim@...sung.com>

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

Regards,
Markus
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