From: Hans Verkuil <hans.verkuil@cisco.com>
Date: Mon, 15 Jun 2015 11:33:37 +0000 (-0300)
Subject: [media] soc_camera: fix expbuf support
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=eb01b1bca9ac7644f178384a594881f2b3433773;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[media] soc_camera: fix expbuf support

- 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>
---

diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index f24062ddd4cd..5f1e5a8cbab4 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -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 */