Separate validation of different argument types. There's no reason to do
this separately for every IOCTL.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 119 +++++++++++++++++++++-------------
1 file changed, 73 insertions(+), 46 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 058c1a6..496f9bc 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -126,6 +126,55 @@ static int subdev_close(struct file *file)
return 0;
}
+static int check_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_format *format)
+{
+ if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
+ format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+ return -EINVAL;
+
+ if (format->pad >= sd->entity.num_pads)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
+{
+ if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
+ crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+ return -EINVAL;
+
+ if (crop->pad >= sd->entity.num_pads)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int check_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_selection *sel)
+{
+ if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
+ sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+ return -EINVAL;
+
+ if (sel->pad >= sd->entity.num_pads)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
+{
+ if (edid->pad >= sd->entity.num_pads)
+ return -EINVAL;
+
+ if (edid->blocks && edid->edid == NULL)
+ return -EINVAL;
+
+ return 0;
+}
+
static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
struct video_device *vdev = video_devdata(file);
@@ -202,26 +251,20 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
case VIDIOC_SUBDEV_G_FMT: {
struct v4l2_subdev_format *format = arg;
+ int rval = check_format(sd, format);
- if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
- format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
-
- if (format->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
}
case VIDIOC_SUBDEV_S_FMT: {
struct v4l2_subdev_format *format = arg;
+ int rval = check_format(sd, format);
- if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
- format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
-
- if (format->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
}
@@ -229,14 +272,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_SUBDEV_G_CROP: {
struct v4l2_subdev_crop *crop = arg;
struct v4l2_subdev_selection sel;
- int rval;
-
- if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
- crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
+ int rval = check_crop(sd, crop);
- if (crop->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
if (rval != -ENOIOCTLCMD)
@@ -258,14 +297,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_SUBDEV_S_CROP: {
struct v4l2_subdev_crop *crop = arg;
struct v4l2_subdev_selection sel;
- int rval;
-
- if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
- crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
+ int rval = check_crop(sd, crop);
- if (crop->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
if (rval != -ENOIOCTLCMD)
@@ -335,13 +370,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_SUBDEV_G_SELECTION: {
struct v4l2_subdev_selection *sel = arg;
+ int rval = check_selection(sd, sel);
- if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
- sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
-
- if (sel->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(
sd, pad, get_selection, subdev_fh, sel);
@@ -349,13 +381,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_SUBDEV_S_SELECTION: {
struct v4l2_subdev_selection *sel = arg;
+ int rval = check_selection(sd, sel);
- if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
- sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
- return -EINVAL;
-
- if (sel->pad >= sd->entity.num_pads)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(
sd, pad, set_selection, subdev_fh, sel);
@@ -363,22 +392,20 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_G_EDID: {
struct v4l2_subdev_edid *edid = arg;
+ int rval = check_edid(sd, edid);
- if (edid->pad >= sd->entity.num_pads)
- return -EINVAL;
- if (edid->blocks && edid->edid == NULL)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(sd, pad, get_edid, edid);
}
case VIDIOC_S_EDID: {
struct v4l2_subdev_edid *edid = arg;
+ int rval = check_edid(sd, edid);
- if (edid->pad >= sd->entity.num_pads)
- return -EINVAL;
- if (edid->blocks && edid->edid == NULL)
- return -EINVAL;
+ if (rval)
+ return rval;
return v4l2_subdev_call(sd, pad, set_edid, edid);
}
--
1.8.3.2
--
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