linux-kernel - [PATCH 5/37] drivers/message/fusion: Use kmemdup

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Message-ID: <Pine.LNX.4.64.1005152314130.21345@ask.diku.dk>
Date:	Sat, 15 May 2010 23:14:36 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Eric Moore <Eric.Moore@....com>, support@....com,
	DL-MPTFusionLinux@....com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 5/37] drivers/message/fusion: Use kmemdup

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

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

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

---
 drivers/message/fusion/mptbase.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -u -p a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -5945,11 +5945,10 @@ mpt_findImVolumes(MPT_ADAPTER *ioc)
 	if (mpt_config(ioc, &cfg) != 0)
 		goto out;
 
-	mem = kmalloc(iocpage2sz, GFP_KERNEL);
+	mem = kmemdup((u8 *)pIoc2, iocpage2sz, GFP_KERNEL);
 	if (!mem)
 		goto out;
 
-	memcpy(mem, (u8 *)pIoc2, iocpage2sz);
 	ioc->raid_data.pIocPg2 = (IOCPage2_t *) mem;
 
 	mpt_read_ioc_pg_3(ioc);
--
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