net: thunderx: Fix memory leak while tearing down interface

Fixed 'tso_hdrs' memory not being freed properly.
Also fixed SQ skbuff maintenance issues.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 8b119a0..2890cd6 100644 (file)
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -425,6 +425,7 @@ static void nicvf_snd_pkt_handler(struct net_device *netdev,
        if (skb) {
                prefetch(skb);
                dev_consume_skb_any(skb);
+               sq->skbuff[cqe_tx->sqe_ptr] = (u64)NULL;
        }
 }
 

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
index 4dae6aa..4c91959 100644 (file)
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -382,7 +382,8 @@ static void nicvf_free_snd_queue(struct nicvf *nic, struct snd_queue *sq)
                return;
 
        if (sq->tso_hdrs)
-               dma_free_coherent(&nic->pdev->dev, sq->dmem.q_len,
+               dma_free_coherent(&nic->pdev->dev,
+                                 sq->dmem.q_len * TSO_HEADER_SIZE,
                                  sq->tso_hdrs, sq->tso_hdrs_phys);
 
        kfree(sq->skbuff);
@@ -863,10 +864,11 @@ void nicvf_sq_free_used_descs(struct net_device *netdev, struct snd_queue *sq,
                        continue;
                }
                skb = (struct sk_buff *)sq->skbuff[sq->head];
+               if (skb)
+                       dev_kfree_skb_any(skb);
                atomic64_add(1, (atomic64_t *)&netdev->stats.tx_packets);
                atomic64_add(hdr->tot_len,
                             (atomic64_t *)&netdev->stats.tx_bytes);
-               dev_kfree_skb_any(skb);
                nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1);
        }
 }
@@ -1048,7 +1050,7 @@ static int nicvf_sq_append_tso(struct nicvf *nic, struct snd_queue *sq,
                }
                nicvf_sq_add_hdr_subdesc(sq, hdr_qentry,
                                         seg_subdescs - 1, skb, seg_len);
-               sq->skbuff[hdr_qentry] = 0;
+               sq->skbuff[hdr_qentry] = (u64)NULL;
                qentry = nicvf_get_nxt_sqentry(sq, qentry);
 
                desc_cnt += seg_subdescs;