linux-kernel - [PATCH] memstick: move the dereference below the NULL test

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Date:	Mon, 10 Sep 2012 12:52:37 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	maximlevitsky@...il.com
Cc:	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org
Subject: [PATCH] memstick: move the dereference below the NULL test

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

The dereference should be moved below the NULL test.

spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/memstick/host/r592.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c
index 29b2172..a7c5b31 100644
--- a/drivers/memstick/host/r592.c
+++ b/drivers/memstick/host/r592.c
@@ -454,7 +454,7 @@ static int r592_transfer_fifo_pio(struct r592_device *dev)
 /* Executes one TPC (data is read/written from small or large fifo) */
 static void r592_execute_tpc(struct r592_device *dev)
 {
-	bool is_write = dev->req->tpc >= MS_TPC_SET_RW_REG_ADRS;
+	bool is_write;
 	int len, error;
 	u32 status, reg;
 
@@ -463,6 +463,7 @@ static void r592_execute_tpc(struct r592_device *dev)
 		return;
 	}
 
+	is_write = dev->req->tpc >= MS_TPC_SET_RW_REG_ADRS;
 	len = dev->req->long_data ?
 		dev->req->sg.length : dev->req->data_len;
 


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