From: Linas Vepstas Date: Mon, 11 Jun 2007 18:52:03 +0000 (-0500) Subject: spidernet: invalidate unused pointer. X-Git-Tag: upstream/snapshot3+hdmi~33085^2~37 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9e0a6e2598ac08d14c3388567eae9a4ccea1244f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git spidernet: invalidate unused pointer. 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 Signed-off-by: Jeff Garzik --- diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c index 4d18007..628efc0 100644 --- a/drivers/net/spider_net.c +++ b/drivers/net/spider_net.c @@ -1187,6 +1187,7 @@ spider_net_decode_one_descr(struct spider_net_card *card) 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 spider_net_card *card) 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) || @@ -1235,7 +1238,7 @@ spider_net_decode_one_descr(struct spider_net_card *card) if (hwdescr->dmac_cmd_status & 0xfcf4) { dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", 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);