linux-kernel - [PATCH 6/20] drivers/net/irda/irtty-sir.c: fix error return code

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Message-Id: <1349281090-10013-11-git-send-email-peter.senna@gmail.com>
Date:	Wed,  3 Oct 2012 18:18:01 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	samuel@...tiz.org
Cc:	kernel-janitors@...r.kernel.org, irda-users@...ts.sourceforge.net,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/20] drivers/net/irda/irtty-sir.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/net/irda/irtty-sir.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/irda/irtty-sir.c b/drivers/net/irda/irtty-sir.c
index 30087ca..6e4d4b6 100644
--- a/drivers/net/irda/irtty-sir.c
+++ b/drivers/net/irda/irtty-sir.c
@@ -459,8 +459,10 @@ static int irtty_open(struct tty_struct *tty)
 
 	/* allocate private device info block */
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv)
+	if (!priv) {
+		ret = -ENOMEM;
 		goto out_put;
+	}
 
 	priv->magic = IRTTY_MAGIC;
 	priv->tty = tty;

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