diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 137a244..e914c41 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -417,7 +417,7 @@
 	if ((addr & 0x3) || (len & 0x3))
 		return -EINVAL;
 
-	data = vmalloc(MEMWIN0_APERTURE/sizeof(__be32));
+	data = vmalloc(MEMWIN0_APERTURE);
 	if (!data)
 		return -ENOMEM;