mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-23 19:30:49 +02:00
50 lines
1.8 KiB
Diff
50 lines
1.8 KiB
Diff
|
From 54789a03adf9c924d0cf7b890323c9c1ca7ab042 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Daniel Hellstrom <daniel@gaisler.com>
|
||
|
|
Date: Wed, 1 Dec 2010 10:26:09 +0100
|
||
|
|
Subject: [PATCH] GRETH: fixed skb buffer memory leak on frame errors
|
||
|
|
|
||
|
|
A new SKB buffer should not be allocated when the old SKB is reused.
|
||
|
|
|
||
|
|
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
|
||
|
|
---
|
||
|
|
drivers/net/greth.c | 17 +++++++++++------
|
||
|
|
1 files changed, 11 insertions(+), 6 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/net/greth.c
|
||
|
|
+++ b/drivers/net/greth.c
|
||
|
|
@@ -879,10 +879,8 @@ static int greth_rx_gbit(struct net_devi
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
- /* Allocate new skb to replace current */
|
||
|
|
- newskb = netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN);
|
||
|
|
-
|
||
|
|
- if (!bad && newskb) {
|
||
|
|
+ /* Allocate new skb to replace current, not needed if the current skb can be reused */
|
||
|
|
+ if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) {
|
||
|
|
skb_reserve(newskb, NET_IP_ALIGN);
|
||
|
|
|
||
|
|
dma_addr = dma_map_single(greth->dev,
|
||
|
|
@@ -919,12 +917,19 @@ static int greth_rx_gbit(struct net_devi
|
||
|
|
if (net_ratelimit())
|
||
|
|
dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n");
|
||
|
|
dev_kfree_skb(newskb);
|
||
|
|
- dev->stats.rx_dropped++;
|
||
|
|
+ dev->stats.rx_dropped++; /* reusing current skb, so it is a drop */
|
||
|
|
}
|
||
|
|
+ } else if ( bad ) {
|
||
|
|
+ /* Bad Frame transfer, the skb is reused */
|
||
|
|
+ dev->stats.rx_dropped++;
|
||
|
|
} else {
|
||
|
|
+ /* Failed Allocating a new skb. This is rather stupid but the current "filled"
|
||
|
|
+ * skb is reused, as if transfer failure. One could argue that RX descriptor table
|
||
|
|
+ * handling should be divided into cleaning and filling as the TX part of the driver
|
||
|
|
+ */
|
||
|
|
if (net_ratelimit())
|
||
|
|
dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n");
|
||
|
|
- dev->stats.rx_dropped++;
|
||
|
|
+ dev->stats.rx_dropped++; /* reusing current skb, so it is a drop */
|
||
|
|
}
|
||
|
|
|
||
|
|
status = GRETH_BD_EN | GRETH_BD_IE;
|