From: Kevin Hao <kexin.hao@windriver.com>
Date: Sat, 21 Jun 2008 10:20:35 +0000 (+0800)
Subject: e100: Do pci_dma_sync after skb_alloc for proper operation on ixp4xx
X-Git-Tag: v2.6.26-rc9~84^2~33
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1923815d855e1daec931fc9f2221fb73ca708870;p=linux-2.6

e100: Do pci_dma_sync after skb_alloc for proper operation on ixp4xx

The E100 device can't work on current kernel (2.6.26-rc6) and will cause
kernel corruption on intel ixdp4xx.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index f3cba5e24e..1037b13323 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -1803,6 +1803,8 @@ static int e100_rx_alloc_skb(struct nic *nic, struct rx *rx)
 	if (rx->prev->skb) {
 		struct rfd *prev_rfd = (struct rfd *)rx->prev->skb->data;
 		put_unaligned_le32(rx->dma_addr, &prev_rfd->link);
+		pci_dma_sync_single_for_device(nic->pdev, rx->prev->dma_addr,
+			sizeof(struct rfd), PCI_DMA_TODEVICE);
 	}
 
 	return 0;