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ethercat
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Fixed re-using RFDs.

This commit is contained in:
Florian Pose 2008-09-30 11:51:23 +00:00
parent 253ded747c
commit 58cc501958
1 changed files with 17 additions and 3 deletions
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20
devices/e100-2.6.20-ethercat.c
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@ -1945,10 +1945,24 @@ static int e100_rx_indicate(struct nic *nic, struct rx *rx,
if (nic->ecdev) {
// make receive frame descriptior usable again
rfd->status = 0x0000;
rfd->command = cpu_to_le16(cb_el);
rx->dma_addr = pci_map_single(nic->pdev, rx->skb->data,
memcpy(skb->data, &nic->blank_rfd, sizeof(struct rfd));
rx->dma_addr = pci_map_single(nic->pdev, skb->data,
RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
if(pci_dma_mapping_error(rx->dma_addr)) {
rx->dma_addr = 0;
}
/* Link the RFD to end of RFA by linking previous RFD to
* this one, and clearing EL bit of previous. */
if(rx->prev->skb) {
struct rfd *prev_rfd = (struct rfd *)rx->prev->skb->data;
put_unaligned(cpu_to_le32(rx->dma_addr),
(u32 *)&prev_rfd->link);
wmb();
prev_rfd->command &= ~cpu_to_le16(cb_el);
pci_dma_sync_single_for_device(nic->pdev, rx->prev->dma_addr,
sizeof(struct rfd), PCI_DMA_TODEVICE);
}
} else {
rx->skb = NULL;
}