V4L/DVB (4474): On some cases, depth were not returned.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/media/video/v4l1-compat.c b/drivers/media/video/v4l1-compat.c
index d7c3fcbc80f7..1d899e2db394 100644
--- a/drivers/media/video/v4l1-compat.c
+++ b/drivers/media/video/v4l1-compat.c
@@ -349,6 +349,8 @@ v4l_compat_translate_ioctl(struct inode         *inode,
         {
                 struct video_buffer     *buffer = arg;
 
+                memset(buffer, 0, sizeof(*buffer));
+
                 err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
                 if (err < 0) {
                         dprintk("VIDIOCGFBUF / VIDIOC_G_FBUF: %d\n",err);
@@ -361,7 +363,7 @@ v4l_compat_translate_ioctl(struct inode         *inode,
                 switch (fbuf2.fmt.pixelformat) {
                 case V4L2_PIX_FMT_RGB332:
                         buffer->depth = 8;
-                                break;
+                        break;
                 case V4L2_PIX_FMT_RGB555:
                         buffer->depth = 15;
                         break;
@@ -377,9 +379,13 @@ v4l_compat_translate_ioctl(struct inode         *inode,
                 default:
                         buffer->depth = 0;
                 }
-                if (0 != fbuf2.fmt.bytesperline)
+                if (fbuf2.fmt.bytesperline) {
                         buffer->bytesperline = fbuf2.fmt.bytesperline;
-                else {
+                        if (!buffer->depth && buffer->width)
+                                buffer->depth   = ((fbuf2.fmt.bytesperline<<3)
+                                                  + (buffer->width-1) )
+                                                  /buffer->width;
+                } else {
                         buffer->bytesperline =
                                 (buffer->width * buffer->depth + 7) & 7;
                         buffer->bytesperline >>= 3;