From 983e2444100667b4b35c9d56c9a1fec1e817143c Mon Sep 17 00:00:00 2001
From: Himangi Saraogi
Date: Sun, 20 Jul 2014 03:23:35 +0530
Subject: powerpc/mpic_msgr: Use kcalloc and correct the argument to sizeof
mpic_msgrs has type struct mpic_msgr **, not struct mpic_msgr *, so the
elements of the array should have pointer type, not structure type.
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 Coccinelle semantic patch that makes the first change is as follows:
//
@disable sizeof_type_expr@
type T;
T **x;
@@
x =
<+...sizeof(
- T
+ *x
)...+>
//
Signed-off-by: Himangi Saraogi
Acked-by: Julia Lawall
Signed-off-by: Scott Wood
---
arch/powerpc/sysdev/mpic_msgr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/sysdev/mpic_msgr.c b/arch/powerpc/sysdev/mpic_msgr.c
index 2c9b52aa266c..7bdf3cc741e4 100644
--- a/arch/powerpc/sysdev/mpic_msgr.c
+++ b/arch/powerpc/sysdev/mpic_msgr.c
@@ -184,7 +184,7 @@ static int mpic_msgr_probe(struct platform_device *dev)
dev_info(&dev->dev, "Found %d message registers\n",
mpic_msgr_count);
- mpic_msgrs = kzalloc(sizeof(struct mpic_msgr) * mpic_msgr_count,
+ mpic_msgrs = kcalloc(mpic_msgr_count, sizeof(*mpic_msgrs),
GFP_KERNEL);
if (!mpic_msgrs) {
dev_err(&dev->dev,
--
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