[PATCH 2.6.13-rc4 4/13] S2io: Removed memory leaks

[raghavendra.koushik@xxxxxxxxxxxx]

Hi,
This patch fixes certain memory leaks discovered in free_tx_buffers()
and rx_osm_handler()

Signed-off-by: Ravinandan Arakali <ravinandan.arakali@xxxxxxxxxxxx>
Signed-off-by: Raghavendra Koushik <raghavendra.koushik@xxxxxxxxxxxx>
---
diff -uprN vanilla_linux/drivers/net/s2io.c linux-2.6.13-rc4/drivers/net/s2io.c
--- vanilla_linux/drivers/net/s2io.c    2005-08-02 02:51:35.000000000 -0700
+++ linux-2.6.13-rc4/drivers/net/s2io.c 2005-08-02 02:51:26.000000000 -0700
@@ -1709,7 +1709,7 @@ static void free_tx_buffers(struct s2io_
        int i, j;
        mac_info_t *mac_control;
        struct config_param *config;
-       int cnt = 0;
+       int cnt = 0, frg_cnt;
 
        mac_control = &nic->mac_control;
        config = &nic->config;
@@ -1722,11 +1722,33 @@ static void free_tx_buffers(struct s2io_
                            (struct sk_buff *) ((unsigned long) txdp->
                                                Host_Control);
                        if (skb == NULL) {
-                               memset(txdp, 0, sizeof(TxD_t));
+                               memset(txdp, 0, sizeof(TxD_t) *
+                                      config->max_txds);
                                continue;
                        }
+                       frg_cnt = skb_shinfo(skb)->nr_frags;
+                       pci_unmap_single(nic->pdev, (dma_addr_t)
+                                        txdp->Buffer_Pointer,
+                                        skb->len - skb->data_len,
+                                        PCI_DMA_TODEVICE);
+                       if (frg_cnt) {
+                               TxD_t *temp;
+                               temp = txdp;
+                               txdp++;
+                               for (j = 0; j < frg_cnt; j++, txdp++) {
+                                       skb_frag_t *frag =
+                                           &skb_shinfo(skb)->frags[j];
+                                       pci_unmap_page(nic->pdev,
+                                                      (dma_addr_t)
+                                                      txdp->
+                                                      Buffer_Pointer,
+                                                      frag->size,
+                                                      PCI_DMA_TODEVICE);
+                               }
+                               txdp = temp;
+                       }
                        dev_kfree_skb(skb);
-                       memset(txdp, 0, sizeof(TxD_t));
+                       memset(txdp, 0, sizeof(TxD_t) * config->max_txds);
                        cnt++;
                }
                DBG_PRINT(INTR_DBG,
@@ -4570,6 +4592,11 @@ static int rx_osm_handler(ring_info_t *r
                unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
                DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%llx\n",
                          dev->name, err);
+               dev_kfree_skb(skb);
+               sp->stats.rx_crc_errors++;
+               atomic_dec(&sp->rx_bufs_left[ring_no]);
+               rxdp->Host_Control = 0;
+               return 0;
        }
 
        /* Updating statistics */