linux-kernel - [PATCH 13/31] media: au0828 fix au0828_create_media

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Message-Id: <ab77ed92dafb05b262a33fcd827f35ad8be3d619.1452105878.git.shuahkh@osg.samsung.com>
Date:	Wed,  6 Jan 2016 13:27:02 -0700
From:	Shuah Khan <shuahkh@....samsung.com>
To:	mchehab@....samsung.com, tiwai@...e.com, clemens@...isch.de,
	hans.verkuil@...co.com, laurent.pinchart@...asonboard.com,
	sakari.ailus@...ux.intel.com, javier@....samsung.com
Cc:	Shuah Khan <shuahkh@....samsung.com>, pawel@...iak.com,
	m.szyprowski@...sung.com, kyungmin.park@...sung.com,
	perex@...ex.cz, arnd@...db.de, dan.carpenter@...cle.com,
	tvboxspy@...il.com, crope@....fi, ruchandani.tina@...il.com,
	corbet@....net, chehabrafael@...il.com, k.kozlowski@...sung.com,
	stefanr@...6.in-berlin.de, inki.dae@...sung.com,
	jh1009.sung@...sung.com, elfring@...rs.sourceforge.net,
	prabhakar.csengg@...il.com, sw0312.kim@...sung.com,
	p.zabel@...gutronix.de, ricardo.ribalda@...il.com,
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	linuxbugs@...tgam.net, johan@...ud.se,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	linux-api@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 13/31] media: au0828 fix au0828_create_media_graph() entity checks

au0828_create_media_graph() doesn't do any checks to determine,
if vbi_dev, vdev, and input entities have been registered prior
to creating pad links. Checking graph_obj.mdev field works as
the graph_obj.mdev field gets initialized in the entity register
interface. Fix it to check graph_obj.mdev field before creating
pad links.

Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
 drivers/media/usb/au0828/au0828-core.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
index f46fb43..8ef7c71 100644
--- a/drivers/media/usb/au0828/au0828-core.c
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -291,20 +291,27 @@ static int au0828_create_media_graph(struct au0828_dev *dev)
 		if (ret)
 			return ret;
 	}
-	ret = media_create_pad_link(decoder, AU8522_PAD_VID_OUT,
-				    &dev->vdev.entity, 0,
-				    MEDIA_LNK_FL_ENABLED);
-	if (ret)
-		return ret;
-	ret = media_create_pad_link(decoder, AU8522_PAD_VBI_OUT,
-				    &dev->vbi_dev.entity, 0,
-				    MEDIA_LNK_FL_ENABLED);
-	if (ret)
-		return ret;
+	if (dev->vdev.entity.graph_obj.mdev) {
+		ret = media_create_pad_link(decoder, AU8522_PAD_VID_OUT,
+					    &dev->vdev.entity, 0,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+	}
+	if (dev->vbi_dev.entity.graph_obj.mdev) {
+		ret = media_create_pad_link(decoder, AU8522_PAD_VBI_OUT,
+					    &dev->vbi_dev.entity, 0,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+	}
 
 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
 		struct media_entity *ent = &dev->input_ent[i];
 
+		if (!ent->graph_obj.mdev)
+			continue;
+
 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
 			break;
 
-- 
2.5.0

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