linux-kernel - [PATCH 7/14] drivers/net/typhoon.c: delete double assignment

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Message-Id: <1288088743-3725-8-git-send-email-julia@diku.dk>
Date:	Tue, 26 Oct 2010 12:25:36 +0200
From:	Julia Lawall <julia@...u.dk>
To:	David Dillow <dave@...dillows.org>
Cc:	kernel-janitors@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 7/14] drivers/net/typhoon.c: delete double assignment

From: Julia Lawall <julia@...u.dk>

Delete successive assignments to the same location.  The current definition
does not initialize the respRing structure, which has the same type as the
cmdRing structure, so initialize that one instead.

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

// <smpl>
@@
expression i;
@@

*i = ...;
 i = ...;
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
This changes the semantics and has not been tested.

 drivers/net/typhoon.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/typhoon.c b/drivers/net/typhoon.c
index 1cc6713..fc014eb 100644
--- a/drivers/net/typhoon.c
+++ b/drivers/net/typhoon.c
@@ -1328,7 +1328,7 @@ typhoon_init_rings(struct typhoon *tp)
 	tp->rxHiRing.lastWrite = 0;
 	tp->rxBuffRing.lastWrite = 0;
 	tp->cmdRing.lastWrite = 0;
-	tp->cmdRing.lastWrite = 0;
+	tp->respRing.lastWrite = 0;
 
 	tp->txLoRing.lastRead = 0;
 	tp->txHiRing.lastRead = 0;

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