linux-kernel - [PATCH 2/2] 3c59x: Fix bad offset spec in skb_frag_dma

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Message-Id: <1410959085-7351-2-git-send-email-nhorman@tuxdriver.com>
Date:	Wed, 17 Sep 2014 09:04:45 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	netdev@...r.kernel.org
Cc:	Neil Horman <nhorman@...driver.com>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Meelis Roos <mroos@...ux.ee>
Subject: [PATCH 2/2] 3c59x: Fix bad offset spec in skb_frag_dma_map

Recently aded the use of skb_frag_dma_map to 3c59x, but didn't realize it
automatically included the frag_offset internally, as well as provided an option
to specify an extra offset in the parameter list.  We need to specify an offset
of 0 in the parameter list to avoid skb corruption that results in lost
connections.

Signed-off-by: Neil Horman <nhorman@...driver.com>
CC: Linux Kernel list <linux-kernel@...r.kernel.org>
CC: "David S. Miller" <davem@...emloft.net>
CC: Meelis Roos <mroos@...ux.ee>
Tested-by: Meelis Roos <mroos@...ux.ee>
---
 drivers/net/ethernet/3com/3c59x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c
index 5621dab..0f59d68 100644
--- a/drivers/net/ethernet/3com/3c59x.c
+++ b/drivers/net/ethernet/3com/3c59x.c
@@ -2186,7 +2186,7 @@ boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
 			dma_addr = skb_frag_dma_map(&VORTEX_PCI(vp)->dev, frag,
-						    frag->page_offset,
+						    0,
 						    frag->size,
 						    DMA_TO_DEVICE);
 			if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr)) {
-- 
1.9.3

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