linux-kernel - [PATCH] Staging: rtl8192e: adjust error handling

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Message-ID: <20140621150951.GA3418@himangi-Dell>
Date:	Sat, 21 Jun 2014 20:39:51 +0530
From:	Himangi Saraogi <himangi774@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH] Staging: rtl8192e: adjust error handling

This patch removes a test in error handling code by adding a return
path.

The Coccinelle semantic match that found the problem is:

// <smpl>
@@
expression E,E1,E2;
@@

E = alloc_etherdev(...)
... when != E = E1
if (...) { ... free_netdev(E); ... return ...; }
... when != E = E2
(
  if (...)
   {
   ... when != free_netdev(E);
   return dev; }
|
* if (...)
   {
   ... when != free_netdev(E);
   return ...; }
|
register_netdev(E)
)

// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@...il.com>
Acked-by: Julia Lawall <julia.lawall@...6.fr>
---
 drivers/staging/rtl8192e/rtllib_module.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8192e/rtllib_module.c b/drivers/staging/rtl8192e/rtllib_module.c
index 136909e..ba95149 100644
--- a/drivers/staging/rtl8192e/rtllib_module.c
+++ b/drivers/staging/rtl8192e/rtllib_module.c
@@ -111,7 +111,7 @@ struct net_device *alloc_rtllib(int sizeof_priv)
 	dev = alloc_etherdev(sizeof(struct rtllib_device) + sizeof_priv);
 	if (!dev) {
 		RTLLIB_ERROR("Unable to network device.\n");
-		goto failed;
+		return NULL;
 	}
 	ieee = (struct rtllib_device *)netdev_priv_rsl(dev);
 	memset(ieee, 0, sizeof(struct rtllib_device)+sizeof_priv);
@@ -180,8 +180,7 @@ struct net_device *alloc_rtllib(int sizeof_priv)
 	return dev;
 
  failed:
-	if (dev)
-		free_netdev(dev);
+	free_netdev(dev);
 	return NULL;
 }
 EXPORT_SYMBOL(alloc_rtllib);
-- 
1.9.1

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