Re: [PATCH] soc_camera: match signedness of soc_camera_limit_side()

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Hi Guennadi,
Guennadi Liakhovetski wrote:
> Hi Németh
> 
> On Tue, 9 Feb 2010, Guennadi Liakhovetski wrote:
> 
>> Ok, I modified your patch a bit, how about the below version? If you 
>> agree, I'll commit it in that form (after converting to utf-8):
>>
>> From: Márton Németh <nm127@xxxxxxxxxxx>
>>
>> The first two parameters of soc_camera_limit_side() are usually pointers 
>> to struct v4l2_rect elements. They are signed, so adjust the prototype 
>> accordingly.
>>
>> This will remove the following sparse warning (see "make C=1"):
>>
>>  * incorrect type in argument 1 (different signedness)
>>        expected unsigned int *start
>>        got signed int *<noident>
>>
>> as well as a couple more signedness mismatches.
>>
>> Signed-off-by: Márton Németh <nm127@xxxxxxxxxxx>
>> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
> 
> please confirm, if you agree with my version of your patch, or I'll have 
> to leave it out from my pull request.

I confirm.

Sorry about the late response, I was not able to access my emails for a while.

Regards,

	Márton Németh


>> ---
>> diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
>> index 1a34d29..e5bae4c 100644
>> --- a/drivers/media/video/mt9v022.c
>> +++ b/drivers/media/video/mt9v022.c
>> @@ -325,7 +325,7 @@ static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
>>  	if (ret < 0)
>>  		return ret;
>>  
>> -	dev_dbg(&client->dev, "Frame %ux%u pixel\n", rect.width, rect.height);
>> +	dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
>>  
>>  	mt9v022->rect = rect;
>>  
>> diff --git a/drivers/media/video/mx3_camera.c b/drivers/media/video/mx3_camera.c
>> index bd297f5..d477e30 100644
>> --- a/drivers/media/video/mx3_camera.c
>> +++ b/drivers/media/video/mx3_camera.c
>> @@ -796,7 +796,7 @@ static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam)
>>   * FIXME: learn to use stride != width, then we can keep stride properly aligned
>>   * and support arbitrary (even) widths.
>>   */
>> -static inline void stride_align(__s32 *width)
>> +static inline void stride_align(__u32 *width)
>>  {
>>  	if (((*width + 7) &  ~7) < 4096)
>>  		*width = (*width + 7) &  ~7;
>> @@ -844,7 +844,7 @@ static int mx3_camera_set_crop(struct soc_camera_device *icd,
>>  		 * So far only direct camera-to-memory is supported
>>  		 */
>>  		if (channel_change_requested(icd, rect)) {
>> -			int ret = acquire_dma_channel(mx3_cam);
>> +			ret = acquire_dma_channel(mx3_cam);
>>  			if (ret < 0)
>>  				return ret;
>>  		}
>> diff --git a/drivers/media/video/rj54n1cb0c.c b/drivers/media/video/rj54n1cb0c.c
>> index 9277194..bbd9c11 100644
>> --- a/drivers/media/video/rj54n1cb0c.c
>> +++ b/drivers/media/video/rj54n1cb0c.c
>> @@ -555,15 +555,15 @@ static int rj54n1_commit(struct i2c_client *client)
>>  	return ret;
>>  }
>>  
>> -static int rj54n1_sensor_scale(struct v4l2_subdev *sd, u32 *in_w, u32 *in_h,
>> -			       u32 *out_w, u32 *out_h);
>> +static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
>> +			       s32 *out_w, s32 *out_h);
>>  
>>  static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
>>  {
>>  	struct i2c_client *client = sd->priv;
>>  	struct rj54n1 *rj54n1 = to_rj54n1(client);
>>  	struct v4l2_rect *rect = &a->c;
>> -	unsigned int dummy = 0, output_w, output_h,
>> +	int dummy = 0, output_w, output_h,
>>  		input_w = rect->width, input_h = rect->height;
>>  	int ret;
>>  
>> @@ -577,7 +577,7 @@ static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
>>  	output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
>>  	output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
>>  
>> -	dev_dbg(&client->dev, "Scaling for %ux%u : %u = %ux%u\n",
>> +	dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
>>  		input_w, input_h, rj54n1->resize, output_w, output_h);
>>  
>>  	ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
>> @@ -638,8 +638,8 @@ static int rj54n1_g_fmt(struct v4l2_subdev *sd,
>>   * the output one, updates the window sizes and returns an error or the resize
>>   * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
>>   */
>> -static int rj54n1_sensor_scale(struct v4l2_subdev *sd, u32 *in_w, u32 *in_h,
>> -			       u32 *out_w, u32 *out_h)
>> +static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
>> +			       s32 *out_w, s32 *out_h)
>>  {
>>  	struct i2c_client *client = sd->priv;
>>  	struct rj54n1 *rj54n1 = to_rj54n1(client);
>> @@ -749,7 +749,7 @@ static int rj54n1_sensor_scale(struct v4l2_subdev *sd, u32 *in_w, u32 *in_h,
>>  	 * improve the image quality or stability for larger frames (see comment
>>  	 * above), but I didn't check the framerate.
>>  	 */
>> -	skip = min(resize / 1024, (unsigned)15);
>> +	skip = min(resize / 1024, 15U);
>>  
>>  	inc_sel = 1 << skip;
>>  
>> @@ -819,7 +819,7 @@ static int rj54n1_sensor_scale(struct v4l2_subdev *sd, u32 *in_w, u32 *in_h,
>>  	*out_w = output_w;
>>  	*out_h = output_h;
>>  
>> -	dev_dbg(&client->dev, "Scaled for %ux%u : %u = %ux%u, skip %u\n",
>> +	dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
>>  		*in_w, *in_h, resize, output_w, output_h, skip);
>>  
>>  	return resize;
>> @@ -1017,7 +1017,7 @@ static int rj54n1_s_fmt(struct v4l2_subdev *sd,
>>  	struct i2c_client *client = sd->priv;
>>  	struct rj54n1 *rj54n1 = to_rj54n1(client);
>>  	const struct rj54n1_datafmt *fmt;
>> -	unsigned int output_w, output_h, max_w, max_h,
>> +	int output_w, output_h, max_w, max_h,
>>  		input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
>>  	int ret;
>>  
>> diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
>> index f09c714..af506bc 100644
>> --- a/drivers/media/video/sh_mobile_ceu_camera.c
>> +++ b/drivers/media/video/sh_mobile_ceu_camera.c
>> @@ -1040,13 +1040,13 @@ static int client_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *crop,
>>  	 */
>>  	if (!memcmp(rect, cam_rect, sizeof(*rect))) {
>>  		/* Even if camera S_CROP failed, but camera rectangle matches */
>> -		dev_dbg(dev, "Camera S_CROP successful for %ux%u@%u:%u\n",
>> +		dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
>>  			rect->width, rect->height, rect->left, rect->top);
>>  		return 0;
>>  	}
>>  
>>  	/* Try to fix cropping, that camera hasn't managed to set */
>> -	dev_geo(dev, "Fix camera S_CROP for %ux%u@%u:%u to %ux%u@%u:%u\n",
>> +	dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
>>  		cam_rect->width, cam_rect->height,
>>  		cam_rect->left, cam_rect->top,
>>  		rect->width, rect->height, rect->left, rect->top);
>> @@ -1102,7 +1102,7 @@ static int client_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *crop,
>>  
>>  		v4l2_subdev_call(sd, video, s_crop, cam_crop);
>>  		ret = client_g_rect(sd, cam_rect);
>> -		dev_geo(dev, "Camera S_CROP %d for %ux%u@%u:%u\n", ret,
>> +		dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
>>  			cam_rect->width, cam_rect->height,
>>  			cam_rect->left, cam_rect->top);
>>  	}
>> @@ -1116,7 +1116,7 @@ static int client_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *crop,
>>  		*cam_rect = cap.bounds;
>>  		v4l2_subdev_call(sd, video, s_crop, cam_crop);
>>  		ret = client_g_rect(sd, cam_rect);
>> -		dev_geo(dev, "Camera S_CROP %d for max %ux%u@%u:%u\n", ret,
>> +		dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
>>  			cam_rect->width, cam_rect->height,
>>  			cam_rect->left, cam_rect->top);
>>  	}
>> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
>> index dcc5b86..5a17365 100644
>> --- a/include/media/soc_camera.h
>> +++ b/include/media/soc_camera.h
>> @@ -264,8 +266,8 @@ static inline unsigned long soc_camera_bus_param_compatible(
>>  		common_flags;
>>  }
>>  
>> -static inline void soc_camera_limit_side(unsigned int *start,
>> -		unsigned int *length, unsigned int start_min,
>> +static inline void soc_camera_limit_side(int *start, int *length,
>> +		unsigned int start_min,
>>  		unsigned int length_min, unsigned int length_max)
>>  {
>>  	if (*length < length_min)
>>
> 
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
> 
> 

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