From: Julia Lawall <julia@diku.dk>
Date: Sat, 2 Oct 2010 04:37:07 +0000 (+0000)
Subject: drivers/atm/idt77252.c: Remove unnecessary error check
X-Git-Tag: v2.6.37~527^2~268
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/mcf548x/linux.git/commitdiff_plain/1790c228fb3f57793160c0f0c20b55c398cab106

drivers/atm/idt77252.c: Remove unnecessary error check

This code does not call deinit_card(card); in an error case, as done in
other error-handling code in the same function.  But actually, the called
function init_sram can only return 0, so there is no need for the error
check at all.

init_sram is also given a void return type, and its single return statement
at the end of the function is dropped.

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

// <smpl>
@r exists@
@r@
statement S1,S2,S3;
constant C1,C2,C3;
@@

*if (...)
 {... S1 return -C1;}
...
*if (...)
 {... when != S1
    return -C2;}
...
*if (...)
 {... S1 return -C3;}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 1679cbf0c584..bce57328ddde 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -3152,7 +3152,7 @@ deinit_card(struct idt77252_dev *card)
 }
 
 
-static int __devinit
+static void __devinit
 init_sram(struct idt77252_dev *card)
 {
 	int i;
@@ -3298,7 +3298,6 @@ init_sram(struct idt77252_dev *card)
 	       SAR_REG_RXFD);
 
 	IPRINTK("%s: SRAM initialization complete.\n", card->name);
-	return 0;
 }
 
 static int __devinit
@@ -3410,8 +3409,7 @@ init_card(struct atm_dev *dev)
 
 	writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
 
-	if (init_sram(card) < 0)
-		return -1;
+	init_sram(card);
 
 /********************************************************************/
 /*  A L L O C   R A M   A N D   S E T   V A R I O U S   T H I N G S */