From 95cf7bbfaf56d6a73992741db04d7d755e072fc6 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Tue, 16 Dec 2008 01:44:05 -0800 Subject: [PATCH] tlan: Fix small (< 64 bytes) datagram transmissions The TLAN chip does not support tranmissions smaller than 64 bytes. Smaller transfers need to be padded up to that size. This was broken by commit id a046236de2a5bc406086b279656ae90054d322ca ("tlan: get rid of padding buffer"). Signed-off-by: Sakari Ailus Signed-off-by: David S. Miller --- drivers/net/tlan.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/net/tlan.c b/drivers/net/tlan.c index c41d687613645..cf8cdafda5af6 100644 --- a/drivers/net/tlan.c +++ b/drivers/net/tlan.c @@ -1098,6 +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", @@ -1108,6 +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; @@ -1125,16 +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; -- 2.39.5