1 files changed, 16 insertions, 22 deletions

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index 418138dd6c68..13e0a43e423b 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -88,12 +88,11 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
 static inline u32
 spider_net_read_reg(struct spider_net_card *card, u32 reg)
 {
-        u32 value;
-
-        value = readl(card->regs + reg);
-        value = le32_to_cpu(value);
-
-        return value;
+        /* We use the powerpc specific variants instead of readl_be() because
+         * we know spidernet is not a real PCI device and we can thus avoid the
+         * performance hit caused by the PCI workarounds.
+         */
+        return in_be32(card->regs + reg);
 }
 
 /**
@@ -105,8 +104,11 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
 static inline void
 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
 {
-        value = cpu_to_le32(value);
-        writel(value, card->regs + reg);
+        /* We use the powerpc specific variants instead of writel_be() because
+         * we know spidernet is not a real PCI device and we can thus avoid the
+         * performance hit caused by the PCI workarounds.
+         */
+        out_be32(card->regs + reg, value);
 }
 
 /** spider_net_write_phy - write to phy register
@@ -644,20 +646,12 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
         struct spider_net_descr *descr;
         dma_addr_t buf;
         unsigned long flags;
-        int length;
-
-        length = skb->len;
-        if (length < ETH_ZLEN) {
-                if (skb_pad(skb, ETH_ZLEN-length))
-                        return 0;
-                length = ETH_ZLEN;
-        }
 
-        buf = pci_map_single(card->pdev, skb->data, length, PCI_DMA_TODEVICE);
+        buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
         if (pci_dma_mapping_error(buf)) {
                 if (netif_msg_tx_err(card) && net_ratelimit())
                         pr_err("could not iommu-map packet (%p, %i). "
-                                  "Dropping packet\n", skb->data, length);
+                                  "Dropping packet\n", skb->data, skb->len);
                 card->spider_stats.tx_iommu_map_error++;
                 return -ENOMEM;
         }
@@ -667,7 +661,7 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
         card->tx_chain.head = descr->next;
 
         descr->buf_addr = buf;
-        descr->buf_size = length;
+        descr->buf_size = skb->len;
         descr->next_descr_addr = 0;
         descr->skb = skb;
         descr->data_status = 0;
@@ -802,8 +796,8 @@ spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
 
                 /* unmap the skb */
                 if (skb) {
-                        int len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
-                        pci_unmap_single(card->pdev, buf_addr, len, PCI_DMA_TODEVICE);
+                        pci_unmap_single(card->pdev, buf_addr, skb->len,
+                                        PCI_DMA_TODEVICE);
                         dev_kfree_skb(skb);
                 }
         }
@@ -1641,7 +1635,7 @@ spider_net_enable_card(struct spider_net_card *card)
                              SPIDER_NET_INT2_MASK_VALUE);
 
         spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
-                             SPIDER_NET_GDTBSTA | SPIDER_NET_GDTDCEIDIS);
+                             SPIDER_NET_GDTBSTA);
 }
 
 /**