linux-kernel - [PATCH] 8139cp : balance dma_map_single vs dma_unmap

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Message-ID: <20090811194622.GA4268@electric-eye.fr.zoreil.com>
Date:	Tue, 11 Aug 2009 21:46:22 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Zdenek Kabelac <zdenek.kabelac@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jgarzik@...ox.com, davem@...hat.com
Subject: [PATCH] 8139cp : balance dma_map_single vs dma_unmap_single pair

The driver always:
1. allocate cp->rx_buf_sz + NET_IP_ALIGN
2. map cp->rx_buf_sz

Signed-off-by: Francois Romieu <romieu@...zoreil.com>
---
 drivers/net/8139cp.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
index 07919d0..4a8995a 100644
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -515,7 +515,7 @@ rx_status_loop:
 		dma_addr_t mapping;
 		struct sk_buff *skb, *new_skb;
 		struct cp_desc *desc;
-		unsigned buflen;
+		const unsigned buflen = cp->rx_buf_sz;
 
 		skb = cp->rx_skb[rx_tail];
 		BUG_ON(!skb);
@@ -549,8 +549,7 @@ rx_status_loop:
 			pr_debug("%s: rx slot %d status 0x%x len %d\n",
 			       dev->name, rx_tail, status, len);
 
-		buflen = cp->rx_buf_sz + NET_IP_ALIGN;
-		new_skb = netdev_alloc_skb(dev, buflen);
+		new_skb = netdev_alloc_skb(dev, buflen + NET_IP_ALIGN);
 		if (!new_skb) {
 			dev->stats.rx_dropped++;
 			goto rx_next;
-- 
1.6.2.5

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