V4L/DVB (10820): meye: 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 querycap, enum_input, enum_fmt_vid_cap, and
g_fmt_vid_cap.

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

diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c
index 163fb2b..d9d73d8 100644 (file)
--- a/drivers/media/video/meye.c
+++ b/drivers/media/video/meye.c
@@ -1017,7 +1017,6 @@ static int meyeioc_stilljcapt(int *len)
 static int vidioc_querycap(struct file *file, void *fh,
                                struct v4l2_capability *cap)
 {
-       memset(cap, 0, sizeof(*cap));
        strcpy(cap->driver, "meye");
        strcpy(cap->card, "meye");
        sprintf(cap->bus_info, "PCI:%s", pci_name(meye.mchip_dev));
@@ -1036,8 +1035,6 @@ static int vidioc_enum_input(struct file *file, void *fh, struct v4l2_input *i)
        if (i->index != 0)
                return -EINVAL;
 
-       memset(i, 0, sizeof(*i));
-       i->index = 0;
        strcpy(i->name, "Camera");
        i->type = V4L2_INPUT_TYPE_CAMERA;
 
@@ -1264,16 +1261,12 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh,
 
        if (f->index == 0) {
                /* standard YUV 422 capture */
-               memset(f, 0, sizeof(*f));
-               f->index = 0;
                f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                f->flags = 0;
                strcpy(f->description, "YUV422");
                f->pixelformat = V4L2_PIX_FMT_YUYV;
        } else {
                /* compressed MJPEG capture */
-               memset(f, 0, sizeof(*f));
-               f->index = 1;
                f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                f->flags = V4L2_FMT_FLAG_COMPRESSED;
                strcpy(f->description, "MJPEG");
@@ -1322,9 +1315,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
        if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;
 
-       memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
-       f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-
        switch (meye.mchip_mode) {
        case MCHIP_HIC_MODE_CONT_OUT:
        default:
@@ -1341,8 +1331,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
        f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
        f->fmt.pix.sizeimage = f->fmt.pix.height *
                               f->fmt.pix.bytesperline;
-       f->fmt.pix.colorspace = 0;
-       f->fmt.pix.priv = 0;
 
        return 0;
 }