[media] videodev2: Set vb2_rect's width and height as unsigned

As discussed on the media summit 2013, there is no reason for the width
and height to be signed.

Therefore this patch is an attempt to convert those fields from __s32 to
__u32.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi> (documentation and smiapp)
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/i2c/mt9p031.c

@@ -519,11 +519,13 @@ static int mt9p031_set_format(struct v4l2_subdev *subdev,
 
 	/* Clamp the width and height to avoid dividing by zero. */
 	width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
-			max(__crop->width / 7, MT9P031_WINDOW_WIDTH_MIN),
+			max_t(unsigned int, __crop->width / 7,
+			      MT9P031_WINDOW_WIDTH_MIN),
 			__crop->width);
 	height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
-			max(__crop->height / 8, MT9P031_WINDOW_HEIGHT_MIN),
-			__crop->height);
+			 max_t(unsigned int, __crop->height / 8,
+			       MT9P031_WINDOW_HEIGHT_MIN),
+			 __crop->height);
 
 	hratio = DIV_ROUND_CLOSEST(__crop->width, width);
 	vratio = DIV_ROUND_CLOSEST(__crop->height, height);
@@ -565,15 +567,17 @@ static int mt9p031_set_crop(struct v4l2_subdev *subdev,
 			  MT9P031_COLUMN_START_MAX);
 	rect.top = clamp(ALIGN(crop->rect.top, 2), MT9P031_ROW_START_MIN,
 			 MT9P031_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2),
-			   MT9P031_WINDOW_WIDTH_MIN,
-			   MT9P031_WINDOW_WIDTH_MAX);
-	rect.height = clamp(ALIGN(crop->rect.height, 2),
-			    MT9P031_WINDOW_HEIGHT_MIN,
-			    MT9P031_WINDOW_HEIGHT_MAX);
+	rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+			     MT9P031_WINDOW_WIDTH_MIN,
+			     MT9P031_WINDOW_WIDTH_MAX);
+	rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+			      MT9P031_WINDOW_HEIGHT_MIN,
+			      MT9P031_WINDOW_HEIGHT_MAX);
 
-	rect.width = min(rect.width, MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
+	rect.width = min_t(unsigned int, rect.width,
+			   MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
+	rect.height = min_t(unsigned int, rect.height,
+			    MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
 
 	__crop = __mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which);