[PATCH] USB: wusb: Use kcalloc instead of kzalloc to allocate array

[Thomas Meyer <thomas@m3y3r.de>]

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/usb/wusbcore/security.c b/drivers/usb/wusbcore/security.c
--- a/drivers/usb/wusbcore/security.c 2011-11-13 11:07:52.997240138 +0100
+++ b/drivers/usb/wusbcore/security.c 2011-11-28 20:06:23.831675334 +0100
@@ -354,7 +354,7 @@ int wusb_dev_4way_handshake(struct wusbh
 	struct wusb_keydvt_in keydvt_in;
 	struct wusb_keydvt_out keydvt_out;
 
-	hs = kzalloc(3*sizeof(hs[0]), GFP_KERNEL);
+	hs = kcalloc(3, sizeof(hs[0]), GFP_KERNEL);
 	if (hs == NULL) {
 		dev_err(dev, "can't allocate handshake data\n");
 		goto error_kzalloc;