[e100 2.6] fix stray skb pointer

["Feldman, Scott" <scott.feldman@xxxxxxxxx>]

* Not setting cb->skb = NULL after releasing skb to OS or during
  initialization of cbs.  Reported by Deepak Saxena
  [dsaxena@xxxxxxxxxxx].

----------

--- linux-2.5/drivers/net/e100.c        2004-03-12 15:32:07.000000000 -0800
+++ linux-2.5/drivers/net/e100.c.mod    2004-03-12 15:32:31.000000000 -0800
@@ -158,7 +158,7 @@
 
 
 #define DRV_NAME               "e100"
-#define DRV_VERSION            "3.0.16"
+#define DRV_VERSION            "3.0.17"
 #define DRV_DESCRIPTION                "Intel(R) PRO/100 Network Driver"
 #define DRV_COPYRIGHT          "Copyright(c) 1999-2004 Intel Corporation"
 #define PFX                    DRV_NAME ": "
@@ -1285,6 +1285,7 @@ static inline int e100_tx_clean(struct n
                                le16_to_cpu(cb->u.tcb.tbd.size),
                                PCI_DMA_TODEVICE);
                        dev_kfree_skb_any(cb->skb);
+                       cb->skb = NULL;
                        tx_cleaned = 1;
                }
                cb->status = 0;
@@ -1347,6 +1348,7 @@ static int e100_alloc_cbs(struct nic *ni
                cb->dma_addr = nic->cbs_dma_addr + i * sizeof(struct cb);
                cb->link = cpu_to_le32(nic->cbs_dma_addr +
                        ((i+1) % count) * sizeof(struct cb));
+               cb->skb = NULL;
        }
 
        nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = nic->cbs;