V4L/DVB (8958): zr36067: Return proper bytes-per-line value

The zr36067 driver should return the actual bytes-per-line value when
queried with ioctl VIDIOC_G_FMT, instead of 0. Otherwise user-space
applications can get confused.

Likewise, with ioctl VIDIOC_S_FMT, we are supposed to fill the
bytes-per-line value. And we shouldn't fail if the caller sets the
initial value to something different from 0. This is perfectly valid
for applications to pre-fill this field with the value they expect.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/zoran_driver.c

@@ -2737,7 +2737,8 @@ zoran_do_ioctl (struct inode *inode,
 				    fh->v4l_settings.format->fourcc;
 				fmt->fmt.pix.colorspace =
 				    fh->v4l_settings.format->colorspace;
-				fmt->fmt.pix.bytesperline = 0;
+				fmt->fmt.pix.bytesperline =
+				    fh->v4l_settings.bytesperline;
 				if (BUZ_MAX_HEIGHT <
 				    (fh->v4l_settings.height * 2))
 					fmt->fmt.pix.field =
@@ -2833,13 +2834,6 @@ zoran_do_ioctl (struct inode *inode,
 				fmt->fmt.pix.pixelformat,
 				(char *) &printformat);
 
-			if (fmt->fmt.pix.bytesperline > 0) {
-				dprintk(5,
-					KERN_ERR "%s: bpl not supported\n",
-					ZR_DEVNAME(zr));
-				return -EINVAL;
-			}
-
 			/* we can be requested to do JPEG/raw playback/capture */
 			if (!
 			    (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
@@ -2923,6 +2917,7 @@ zoran_do_ioctl (struct inode *inode,
 				fh->jpg_buffers.buffer_size =
 				    zoran_v4l2_calc_bufsize(&fh->
 							    jpg_settings);
+				fmt->fmt.pix.bytesperline = 0;
 				fmt->fmt.pix.sizeimage =
 				    fh->jpg_buffers.buffer_size;
 
@@ -2979,6 +2974,8 @@ zoran_do_ioctl (struct inode *inode,
 
 				/* tell the user the
 				 * results/missing stuff */
+				fmt->fmt.pix.bytesperline =
+					fh->v4l_settings.bytesperline;
 				fmt->fmt.pix.sizeimage =
 					fh->v4l_settings.height *
 					fh->v4l_settings.bytesperline;