You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.3 KiB
41 lines
1.3 KiB
From 2d12a9abf3f81de5b51852e3cfcba8cedac82642 Mon Sep 17 00:00:00 2001
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Fri, 6 Dec 2013 01:14:52 +0100
|
|
Subject: [PATCH] bgmac: check length of received frame
|
|
|
|
---
|
|
drivers/net/ethernet/broadcom/bgmac.c | 9 ++++++++-
|
|
1 file changed, 8 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/net/ethernet/broadcom/bgmac.c
|
|
+++ b/drivers/net/ethernet/broadcom/bgmac.c
|
|
@@ -349,6 +349,7 @@ static int bgmac_dma_rx_read(struct bgma
|
|
struct sk_buff *skb = slot->skb;
|
|
struct bgmac_rx_header *rx;
|
|
u16 len, flags;
|
|
+ int count;
|
|
|
|
/* Unmap buffer to make it accessible to the CPU */
|
|
dma_sync_single_for_cpu(dma_dev, slot->dma_addr,
|
|
@@ -357,6 +358,12 @@ static int bgmac_dma_rx_read(struct bgma
|
|
/* Get info from the header */
|
|
rx = (struct bgmac_rx_header *)skb->data;
|
|
len = le16_to_cpu(rx->len);
|
|
+ for (count = 0; count < 200; count++) {
|
|
+ len = le16_to_cpu(rx->len);
|
|
+ if (len)
|
|
+ break;
|
|
+ udelay(1);
|
|
+ }
|
|
flags = le16_to_cpu(rx->flags);
|
|
|
|
do {
|
|
@@ -364,7 +371,7 @@ static int bgmac_dma_rx_read(struct bgma
|
|
int err;
|
|
|
|
/* Check for poison and drop or pass the packet */
|
|
- if (len == 0xdead && flags == 0xbeef) {
|
|
+ if (!len || (len == 0xdead && flags == 0xbeef)) {
|
|
bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
|
|
ring->start);
|
|
dma_sync_single_for_device(dma_dev,
|
|
|