linux-kernel - [PATCH 4/5] drivers/media/platform/vino.c: fix error return code

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Message-Id: <1346775269-12191-2-git-send-email-peter.senna@gmail.com>
Date:	Tue,  4 Sep 2012 18:14:26 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	kernel-janitors@...r.kernel.org, Julia.Lawall@...6.fr,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] drivers/media/platform/vino.c: fix error return code

From: Peter Senna Tschudin <peter.senna@...il.com>

Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>

---
 drivers/media/platform/vino.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/vino.c b/drivers/media/platform/vino.c
index cc9110c..6654a28 100644
--- a/drivers/media/platform/vino.c
+++ b/drivers/media/platform/vino.c
@@ -2061,6 +2061,7 @@ static int vino_capture_next(struct vino_channel_settings *vcs, int start)
 	}
 	if (incoming == 0) {
 		dprintk("vino_capture_next(): no buffers available\n");
+		err = -ENOMEM;
 		goto out;
 	}
 

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