g/s_parm should fill in readbuffers.
For non-webcams s_parm should return -ENOTTY instead of -EINVAL.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Devin Heitmueller <dheitmuel...@kernellabs.com>
---
drivers/media/usb/em28xx/em28xx-video.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/em28xx/em28xx-video.c
b/drivers/media/usb/em28xx/em28xx-video.c
index acdb434..a91a248 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -972,6 +972,7 @@ static int vidioc_g_parm(struct file *file, void *priv,
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
+ p->parm.capture.readbuffers = EM28XX_MIN_BUF;
if (dev->board.is_webcam)
rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
video, g_parm, p);
@@ -989,11 +990,12 @@ static int vidioc_s_parm(struct file *file, void *priv,
struct em28xx *dev = fh->dev;
if (!dev->board.is_webcam)
- return -EINVAL;
+ return -ENOTTY;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
+ p->parm.capture.readbuffers = EM28XX_MIN_BUF;
return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
}
--
1.7.9.5
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