tlan: Fix small (< 64 bytes) datagram transmissions

[linux-2.6-omap-h63xx.git] / drivers / net / tlan.c

diff --git a/drivers/net/tlan.c b/drivers/net/tlan.c
index ec871f646766dc7294101fe5ad7f789b66d3f0bb..cf8cdafda5af66f4301883c9bb6e8764e5b60fc4 100644 (file)
--- a/drivers/net/tlan.c
+++ b/drivers/net/tlan.c
@@ -29,7 +29,8 @@
  *
  *     Tigran Aivazian <tigran@sco.com>:       TLan_PciProbe() now uses
  *                                             new PCI BIOS interface.
- *     Alan Cox        <alan@redhat.com>:      Fixed the out of memory
+ *     Alan Cox        <alan@lxorguk.ukuu.org.uk>:
+ *                                             Fixed the out of memory
  *                                             handling.
  *
  *     Torben Mathiasen <torben.mathiasen@compaq.com> New Maintainer!
@@ -1097,6 +1098,7 @@ static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
        dma_addr_t      tail_list_phys;
        u8              *tail_buffer;
        unsigned long   flags;
+       unsigned int    txlen;
 
        if ( ! priv->phyOnline ) {
                TLAN_DBG( TLAN_DEBUG_TX, "TRANSMIT:  %s PHY is not ready\n",
@@ -1107,6 +1109,7 @@ static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
 
        if (skb_padto(skb, TLAN_MIN_FRAME_SIZE))
                return 0;
+       txlen = max(skb->len, (unsigned int)TLAN_MIN_FRAME_SIZE);
 
        tail_list = priv->txList + priv->txTail;
        tail_list_phys = priv->txListDMA + sizeof(TLanList) * priv->txTail;
@@ -1124,16 +1127,16 @@ static int TLan_StartTx( struct sk_buff *skb, struct net_device *dev )
 
        if ( bbuf ) {
                tail_buffer = priv->txBuffer + ( priv->txTail * TLAN_MAX_FRAME_SIZE );
-               skb_copy_from_linear_data(skb, tail_buffer, skb->len);
+               skb_copy_from_linear_data(skb, tail_buffer, txlen);
        } else {
                tail_list->buffer[0].address = pci_map_single(priv->pciDev,
-                                                             skb->data, skb->len,
+                                                             skb->data, txlen,
                                                              PCI_DMA_TODEVICE);
                TLan_StoreSKB(tail_list, skb);
        }
 
-       tail_list->frameSize = (u16) skb->len;
-       tail_list->buffer[0].count = TLAN_LAST_BUFFER | (u32) skb->len;
+       tail_list->frameSize = (u16) txlen;
+       tail_list->buffer[0].count = TLAN_LAST_BUFFER | (u32) txlen;
        tail_list->buffer[1].count = 0;
        tail_list->buffer[1].address = 0;