[media] v4l: subdev: Unify argument validation across IOCTLs
Separate validation of different argument types. There's no reason to do this separately for every IOCTL. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -126,6 +126,55 @@ static int subdev_close(struct file *file)
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return 0;
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}
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static int check_format(struct v4l2_subdev *sd,
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struct v4l2_subdev_format *format)
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{
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if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
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format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (format->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
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{
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if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
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crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (crop->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_selection *sel)
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{
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if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
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sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (sel->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
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{
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if (edid->pad >= sd->entity.num_pads)
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return -EINVAL;
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if (edid->blocks && edid->edid == NULL)
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return -EINVAL;
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return 0;
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}
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static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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{
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struct video_device *vdev = video_devdata(file);
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@ -134,6 +183,7 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
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#endif
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int rval;
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switch (cmd) {
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case VIDIOC_QUERYCTRL:
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@ -206,12 +256,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_G_FMT: {
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struct v4l2_subdev_format *format = arg;
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if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
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format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (format->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_format(sd, format);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
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}
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@ -219,12 +266,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_S_FMT: {
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struct v4l2_subdev_format *format = arg;
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if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
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format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (format->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_format(sd, format);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
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}
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@ -232,14 +276,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_G_CROP: {
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struct v4l2_subdev_crop *crop = arg;
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struct v4l2_subdev_selection sel;
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int rval;
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if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
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crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (crop->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_crop(sd, crop);
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if (rval)
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return rval;
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rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
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if (rval != -ENOIOCTLCMD)
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@ -261,14 +301,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_S_CROP: {
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struct v4l2_subdev_crop *crop = arg;
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struct v4l2_subdev_selection sel;
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int rval;
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if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
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crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (crop->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_crop(sd, crop);
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if (rval)
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return rval;
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rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
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if (rval != -ENOIOCTLCMD)
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@ -339,12 +375,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_G_SELECTION: {
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struct v4l2_subdev_selection *sel = arg;
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if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
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sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (sel->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_selection(sd, sel);
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if (rval)
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return rval;
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return v4l2_subdev_call(
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sd, pad, get_selection, subdev_fh, sel);
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@ -353,12 +386,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_SUBDEV_S_SELECTION: {
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struct v4l2_subdev_selection *sel = arg;
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if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
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sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (sel->pad >= sd->entity.num_pads)
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return -EINVAL;
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rval = check_selection(sd, sel);
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if (rval)
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return rval;
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return v4l2_subdev_call(
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sd, pad, set_selection, subdev_fh, sel);
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@ -367,10 +397,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_G_EDID: {
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struct v4l2_subdev_edid *edid = arg;
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if (edid->pad >= sd->entity.num_pads)
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return -EINVAL;
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if (edid->blocks && edid->edid == NULL)
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return -EINVAL;
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rval = check_edid(sd, edid);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, get_edid, edid);
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}
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@ -378,10 +407,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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case VIDIOC_S_EDID: {
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struct v4l2_subdev_edid *edid = arg;
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if (edid->pad >= sd->entity.num_pads)
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return -EINVAL;
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if (edid->blocks && edid->edid == NULL)
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return -EINVAL;
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rval = check_edid(sd, edid);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, set_edid, edid);
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}
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