Invalidate a pointer as its pci_unmap'ed; this is a bit of paranoia to make sure hardware doesn't continue trying to DMA to it.
Signed-off-by: Linas Vepstas <[EMAIL PROTECTED]> ---- drivers/net/spider_net.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) Index: linux-2.6.22-rc1/drivers/net/spider_net.c =================================================================== --- linux-2.6.22-rc1.orig/drivers/net/spider_net.c 2007-06-11 11:51:19.000000000 -0500 +++ linux-2.6.22-rc1/drivers/net/spider_net.c 2007-06-11 11:53:21.000000000 -0500 @@ -1187,6 +1187,7 @@ spider_net_decode_one_descr(struct spide struct spider_net_descr_chain *chain = &card->rx_chain; struct spider_net_descr *descr = chain->tail; struct spider_net_hw_descr *hwdescr = descr->hwdescr; + u32 hw_buf_addr; int status; status = spider_net_get_descr_status(hwdescr); @@ -1200,7 +1201,9 @@ spider_net_decode_one_descr(struct spide chain->tail = descr->next; /* unmap descriptor */ - pci_unmap_single(card->pdev, hwdescr->buf_addr, + hw_buf_addr = hwdescr->buf_addr; + hwdescr->buf_addr = 0xffffffff; + pci_unmap_single(card->pdev, hw_buf_addr, SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || @@ -1237,7 +1240,7 @@ spider_net_decode_one_descr(struct spide dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", card->netdev->name, hwdescr->dmac_cmd_status); - pr_err("buf_addr=x%08x\n", hwdescr->buf_addr); + pr_err("buf_addr=x%08x\n", hw_buf_addr); pr_err("buf_size=x%08x\n", hwdescr->buf_size); pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); pr_err("result_size=x%08x\n", hwdescr->result_size); - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html