linux-kernel - [PATCH 3/9] media: sun6i-csi: bridge: Error out on invalid port to fix warning

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Date:   Thu,  8 Dec 2022 12:47:36 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-staging@...ts.linux.dev
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@....fi>
Subject: [PATCH 3/9] media: sun6i-csi: bridge: Error out on invalid port to fix warning

The enabled variable is only set for a valid port and used later,
which triggers an uninitialized use smatch warning. Explicitly error
out in that case to fix the warning.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
index 88df3a73ebfa..4517c0346eef 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
@@ -663,7 +663,7 @@ sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier *notifier,
 		enabled = !bridge->source_parallel.expected;
 		break;
 	default:
-		break;
+		return -EINVAL;
 	}
 
 	source->subdev = remote_subdev;
-- 
2.38.1