sis190: use the allocated buffer as a status code in sis190_alloc_rx_skb

The local status code does not carry mory information.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>

1 files changed, 15 insertions, 22 deletions

diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c
index 20745fd4e97..0d6aa1fc9c6 100644
--- a/drivers/net/sis190.c
+++ b/drivers/net/sis190.c
@@ -480,30 +480,22 @@ static inline void sis190_make_unusable_by_asic(struct RxDesc *desc)
         desc->status = 0x0;
 }
 
-static int sis190_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
-                               struct RxDesc *desc, u32 rx_buf_sz)
+static struct sk_buff *sis190_alloc_rx_skb(struct pci_dev *pdev,
+                                           struct RxDesc *desc, u32 rx_buf_sz)
 {
         struct sk_buff *skb;
-        dma_addr_t mapping;
-        int ret = 0;
 
         skb = dev_alloc_skb(rx_buf_sz);
-        if (!skb)
-                goto err_out;
-
-        *sk_buff = skb;
-
-        mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
-                                 PCI_DMA_FROMDEVICE);
+        if (likely(skb)) {
+                dma_addr_t mapping;
 
-        sis190_map_to_asic(desc, mapping, rx_buf_sz);
-out:
-        return ret;
+                mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
+                                         PCI_DMA_FROMDEVICE);
+                sis190_map_to_asic(desc, mapping, rx_buf_sz);
+        } else
+                sis190_make_unusable_by_asic(desc);
 
-err_out:
-        ret = -ENOMEM;
-        sis190_make_unusable_by_asic(desc);
-        goto out;
+        return skb;
 }
 
 static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
@@ -512,14 +504,15 @@ static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
         u32 cur;
 
         for (cur = start; cur < end; cur++) {
-                int ret, i = cur % NUM_RX_DESC;
+                unsigned int i = cur % NUM_RX_DESC;
 
                 if (tp->Rx_skbuff[i])
                         continue;
 
-                ret = sis190_alloc_rx_skb(tp->pci_dev, tp->Rx_skbuff + i,
-                                          tp->RxDescRing + i, tp->rx_buf_sz);
-                if (ret < 0)
+                tp->Rx_skbuff[i] = sis190_alloc_rx_skb(tp->pci_dev,
+                                                       tp->RxDescRing + i,
+                                                       tp->rx_buf_sz);
+                if (!tp->Rx_skbuff[i])
                         break;
         }
         return cur - start;