enic: Check if rq/wq buf not NULL before freeing them

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/enic/vnic_rq.c

@@ -77,9 +77,11 @@ void vnic_rq_free(struct vnic_rq *rq)
 	vnic_dev_free_desc_ring(vdev, &rq->ring);
 
 	for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
+		if (rq->bufs[i]) {
 			kfree(rq->bufs[i]);
 			rq->bufs[i] = NULL;
 		}
+	}
 
 	rq->ctrl = NULL;
 }

drivers/net/enic/vnic_wq.c

@@ -77,9 +77,11 @@ void vnic_wq_free(struct vnic_wq *wq)
 	vnic_dev_free_desc_ring(vdev, &wq->ring);
 
 	for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
+		if (wq->bufs[i]) {
 			kfree(wq->bufs[i]);
 			wq->bufs[i] = NULL;
 		}
+	}
 
 	wq->ctrl = NULL;
 }