On Mon, Sep 16, 2019 at 02:50:53PM -0700, Arlie Davis wrote:
> See section 4.2.2 for the specs on the transfer descriptor.
>
> Here's my patch that fixes it:
>
> diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c
> b/drivers/net/ethernet/dec/tulip/de2104x.c
> index f1a2da15dd0a..3a420ceb52e5 100644
> --- a/drivers/net/ethernet/dec/tulip/de2104x.c
> +++ b/drivers/net/ethernet/dec/tulip/de2104x.c
> @@ -545,6 +545,7 @@ static void de_tx (struct de_private *de)
> while (tx_tail != tx_head) {
> struct sk_buff *skb;
> u32 status;
> + u32 control;
>
> rmb();
> status = le32_to_cpu(de->tx_ring[tx_tail].opts1);
> @@ -565,7 +566,8 @@ static void de_tx (struct de_private *de)
> pci_unmap_single(de->pdev, de->tx_skb[tx_tail].mapping,
> skb->len, PCI_DMA_TODEVICE);
>
> - if (status & LastFrag) {
> + control = le32_to_cpu(de->tx_ring[tx_tail].opts2);
> + if (control & LastFrag) {
how about just remove the complete if ? We know that we always
use one descriptor per packet and chip doesn't touch control
field. So I see no reason to check it here. Tulip driver for
2114x cards doesn't check it neither.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
