From: Dale Farnsworth <dale@farnsworth.org>
Date: Wed, 13 Sep 2006 16:21:08 +0000 (-0700)
Subject: [PATCH] mv643xx_eth: Unmap DMA buffers in receive path
X-Git-Tag: v2.6.18~24
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71d28725548be203e8b8f6ad63b1f64fd7f02d4d;p=linux-2.6

[PATCH] mv643xx_eth: Unmap DMA buffers in receive path

Fix a missing call to dma_unmap_single() in the receive path.  Without
this call, errors have been observed on non-cache-coherent systems.

Signed-off-by Dale Farnsworth <dale@farnsworth.org>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 760c61b988..eeab1df5be 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -385,6 +385,8 @@ static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
 	struct pkt_info pkt_info;
 
 	while (budget-- > 0 && eth_port_receive(mp, &pkt_info) == ETH_OK) {
+		dma_unmap_single(NULL, pkt_info.buf_ptr, RX_SKB_SIZE,
+							DMA_FROM_DEVICE);
 		mp->rx_desc_count--;
 		received_packets++;