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[media] soc_camera: fix expbuf support

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- For vb1 drivers just return -ENOTTY.
- For vb2 drivers allow vb2_expbuf without there being a stream owner:
  the vb2_expbuf function will return the correct error message in that case.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-06-15 08:33:37 -03:00 committed by Mauro Carvalho Chehab
parent d53c0f7275
commit eb01b1bca9
1 changed files with 5 additions and 6 deletions
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11
drivers/media/platform/soc_camera/soc_camera.c
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@ -470,14 +470,13 @@ static int soc_camera_expbuf(struct file *file, void *priv,
struct soc_camera_device *icd = file->private_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
if (icd->streamer != file)
return -EBUSY;
/* videobuf2 only */
if (ici->ops->init_videobuf)
return -EINVAL;
else
return vb2_expbuf(&icd->vb2_vidq, p);
return -ENOTTY;
if (icd->streamer && icd->streamer != file)
return -EBUSY;
return vb2_expbuf(&icd->vb2_vidq, p);
}
/* Always entered with .host_lock held */