V4L/DVB (10819): gspca: Don't need to zero ioctl parameter fields

The v4l2 core code in v4l2_ioctl will zero out the structure the driver is
supposed to fill in for read-only ioctls.  For read/write ioctls, all the
fields which aren't supplied from userspace will be zeroed out.

Zeroing code is removed from g_audio, enum_input, g_parm and gmbuf.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 8aac7a1..ed18401 100644 (file)
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1099,7 +1099,6 @@ static int vidioc_s_audio(struct file *file, void *priv,
 static int vidioc_g_audio(struct file *file, void *priv,
                         struct v4l2_audio *audio)
 {
-       memset(audio, 0, sizeof *audio);
        strcpy(audio->name, "Microphone");
        return 0;
 }
@@ -1133,7 +1132,6 @@ static int vidioc_enum_input(struct file *file, void *priv,
 
        if (input->index != 0)
                return -EINVAL;
-       memset(input, 0, sizeof *input);
        input->type = V4L2_INPUT_TYPE_CAMERA;
        strncpy(input->name, gspca_dev->sd_desc->name,
                sizeof input->name);
@@ -1341,7 +1339,6 @@ static int vidioc_g_parm(struct file *filp, void *priv,
 {
        struct gspca_dev *gspca_dev = priv;
 
-       memset(parm, 0, sizeof *parm);
        parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        parm->parm.capture.readbuffers = gspca_dev->nbufread;
 
@@ -1411,7 +1408,6 @@ static int vidiocgmbuf(struct file *file, void *priv,
                {
                        struct v4l2_format fmt;
 
-                       memset(&fmt, 0, sizeof fmt);
                        fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                        i = gspca_dev->cam.nmodes - 1;  /* highest mode */
                        fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;