linux-kernel - [PATCH] [SCSI] bnx2fc: Use kcalloc instead of kzalloc to allocate array

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Message-ID: <1322600880.1534.329.camel@localhost.localdomain>
Date:	Tue, 29 Nov 2011 22:08:00 +0100
From:	Thomas Meyer <thomas@...3r.de>
To:	JBottomley@...allels.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [SCSI] bnx2fc: Use kcalloc instead of kzalloc to allocate
 array

The advantage of kcalloc is, that will prevent integer overflows which could
result from the multiplication of number of elements and size and it is also
a bit nicer to read.

The semantic patch that makes this change is available
in https://lkml.org/lkml/2011/11/25/107

Signed-off-by: Thomas Meyer <thomas@...3r.de>
---

diff -u -p a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c 2011-11-13 11:07:46.087131212 +0100
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c 2011-11-28 20:02:42.476121413 +0100
@@ -270,15 +270,15 @@ struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_al
 		return NULL;
 	}
 
-	cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
-				  arr_sz, GFP_KERNEL);
+	cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list),
+				  GFP_KERNEL);
 	if (!cmgr->free_list) {
 		printk(KERN_ERR PFX "failed to alloc free_list\n");
 		goto mem_err;
 	}
 
-	cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
-				       arr_sz, GFP_KERNEL);
+	cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock),
+				       GFP_KERNEL);
 	if (!cmgr->free_list_lock) {
 		printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
 		goto mem_err;
--
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