linux-kernel - [PATCH 9/14] drivers/ipack/devices/ipoctal.c: adjust duplicate test

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Message-Id: <1358773378-4700-10-git-send-email-Julia.Lawall@lip6.fr>
Date:	Mon, 21 Jan 2013 14:02:53 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Samuel Iglesias Gonsalvez <siglesias@...lia.com>
Cc:	kernel-janitors@...r.kernel.org,
	Jens Taprogge <jens.taprogge@...rogge.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	industrypack-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 9/14] drivers/ipack/devices/ipoctal.c: adjust duplicate test

From: Julia Lawall <Julia.Lawall@...6.fr>

Delete successive tests to the same location.  The code tested the result
of a previous allocation, that itself was already tested.  It is changed to
test the result of the most recent allocation.

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

// <smpl>
@s exists@
local idexpression y;
expression x,e;
@@

*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\)
    when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\)
*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/ipack/devices/ipoctal.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 8fb2e34..f3a83b1 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -282,7 +282,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
 	ipoctal->mem8_space =
 		devm_ioremap_nocache(&ipoctal->dev->dev,
 				     region->start, 0x8000);
-	if (!addr) {
+	if (!ipoctal->mem8_space) {
 		dev_err(&ipoctal->dev->dev,
 			"Unable to map slot [%d:%d] MEM8 space!\n",
 			bus_nr, slot);

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