Hi Hans
On 02/02/2018 11:05 AM, Hans Verkuil wrote:
If the subdev did not define any controls, then return -ENOTTY if
userspace attempts to call these ioctls.
The control framework functions will return -EINVAL, not -ENOTTY if
vfh->ctrl_handler is NULL.
Several of these framework functions are also called directly from
drivers, so I don't want to change the error code there.
Right, I see, thanks for the patch
Found with vimc and v4l2-compliance.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Acked-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
---
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 43fefa73e0a3..be7a19272614 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -187,27 +187,43 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
switch (cmd) {
case VIDIOC_QUERYCTRL:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_queryctrl(vfh->ctrl_handler, arg);
case VIDIOC_QUERY_EXT_CTRL:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
case VIDIOC_QUERYMENU:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_querymenu(vfh->ctrl_handler, arg);
case VIDIOC_G_CTRL:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_g_ctrl(vfh->ctrl_handler, arg);
case VIDIOC_S_CTRL:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
case VIDIOC_G_EXT_CTRLS:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
case VIDIOC_S_EXT_CTRLS:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
case VIDIOC_TRY_EXT_CTRLS:
+ if (!vfh->ctrl_handler)
+ return -ENOTTY;
return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
case VIDIOC_DQEVENT:
