uwb: use kcalloc where appropriate

Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 7d192f3..c038635 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -674,7 +674,7 @@
 	size_t buf_itr, buf_size, buf_itr_size;
 
 	result = -ENOMEM;
-	xfer->seg = kzalloc(xfer->segs * sizeof(xfer->seg[0]), GFP_ATOMIC);
+	xfer->seg = kcalloc(xfer->segs, sizeof(xfer->seg[0]), GFP_ATOMIC);
 	if (xfer->seg == NULL)
 		goto error_segs_kzalloc;
 	buf_itr = 0;