Returning -EINVAL indicates wrong arguments, but that's not the case here.
Returning -ENOTTY is also no option, since the ioctl is implemented, but it just is not valid for
this input.
So use -ENODATA instead. This is also used elsewhere when an ioctl isn't valid for a specific
input.
In this case G/S_SELECTION returned -EINVAL for the webcam input. That input doesn't support
cropping, instead it uses ENUM_FRAMESIZES to enumerate a list of discrete frame sizes.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
A patch for docs-next will follow.
---
diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index d404a7c..d5c84ec 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -823,7 +823,7 @@ int vivid_vid_cap_g_selection(struct file *file, void *priv,
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (vivid_is_webcam(dev))
- return -EINVAL;
+ return -ENODATA;
sel->r.left = sel->r.top = 0;
switch (sel->target) {
@@ -872,7 +872,7 @@ int vivid_vid_cap_s_selection(struct file *file, void *fh, struct v4l2_selection
if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (vivid_is_webcam(dev))
- return -EINVAL;
+ return -ENODATA;
switch (s->target) {
case V4L2_SEL_TGT_CROP:
--
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