linux-kernel - [patch] cx88: improve error handling

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Date:	Fri, 2 Apr 2010 14:31:50 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	Hans Verkuil <hverkuil@...all.nl>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Devin Heitmueller <dheitmueller@...nellabs.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] cx88: improve error handling

Return -EINVAL if we don't find the right query control id.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 48c450f..b4c80cb 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -1537,9 +1537,12 @@ static int radio_queryctrl (struct file *file, void *priv,
 		c->id >= V4L2_CID_LASTP1)
 		return -EINVAL;
 	if (c->id == V4L2_CID_AUDIO_MUTE) {
-		for (i = 0; i < CX8800_CTLS; i++)
+		for (i = 0; i < CX8800_CTLS; i++) {
 			if (cx8800_ctls[i].v.id == c->id)
 				break;
+		}
+		if (i == CX8800_CTLS)
+			return -EINVAL;
 		*c = cx8800_ctls[i].v;
 	} else
 		*c = no_ctl;
--
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