[PATCH] [SCSI] libsas: Use kcalloc instead of kzalloc to allocate array

[PATCH] [SCSI] libsas: Use kcalloc instead of kzalloc to allocate array

[Thomas Meyer]

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@m3y3r.de>
---

diff -u -p a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
--- a/drivers/scsi/libsas/sas_expander.c 2011-11-13 11:07:46.460470430 +0100
+++ b/drivers/scsi/libsas/sas_expander.c 2011-11-28 20:04:24.150985642 +0100
@@ -306,7 +306,7 @@ static int sas_expander_discover(struct
 	struct expander_device *ex = &dev->ex_dev;
 	int res = -ENOMEM;
 
-	ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
+	ex->ex_phy = kcalloc(ex->num_phys, sizeof(*ex->ex_phy), GFP_KERNEL);
 	if (!ex->ex_phy)
 		return -ENOMEM;