[PATCH] e100: fix skb leak in tx timeout

* If e100 experiences a transmit timeout, and the tx ring is completely
full at the time, it will leak all of the skbs on the tx ring (because
extra logic is needed to distinguish ring full from ring empty).  Jay
Vosburgh [fubar@us.ibm.com].

Signed-off-by: scott.feldman@intel.com

drivers/net/e100.c

@@ -1323,7 +1323,7 @@ static inline int e100_tx_clean(struct nic *nic)
 static void e100_clean_cbs(struct nic *nic)
 {
 	if(nic->cbs) {
-		while(nic->cb_to_clean != nic->cb_to_use) {
+		while(nic->cbs_avail != nic->params.cbs.count) {
 			struct cb *cb = nic->cb_to_clean;
 			if(cb->skb) {
 				pci_unmap_single(nic->pdev,
@@ -1333,8 +1333,8 @@ static void e100_clean_cbs(struct nic *nic)
 				dev_kfree_skb(cb->skb);
 			}
 			nic->cb_to_clean = nic->cb_to_clean->next;
+			nic->cbs_avail++;
 		}
-		nic->cbs_avail = nic->params.cbs.count;
 		pci_free_consistent(nic->pdev,
 			sizeof(struct cb) * nic->params.cbs.count,
 			nic->cbs, nic->cbs_dma_addr);