diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index 3b8e675087de..369f6ae700c7 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -499,8 +499,7 @@ struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs)
 {
 	struct nfp_reprs *reprs;
 
-	reprs = kzalloc(sizeof(*reprs) +
-			num_reprs * sizeof(struct net_device *), GFP_KERNEL);
+	reprs = kzalloc(struct_size(reprs, reprs, num_reprs), GFP_KERNEL);
 	if (!reprs)
 		return NULL;
 	reprs->num_reprs = num_reprs;