41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From 2d12a9abf3f81de5b51852e3cfcba8cedac82642 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Fri, 6 Dec 2013 01:14:52 +0100
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Subject: [PATCH] bgmac: check length of received frame
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---
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drivers/net/ethernet/broadcom/bgmac.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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--- a/drivers/net/ethernet/broadcom/bgmac.c
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+++ b/drivers/net/ethernet/broadcom/bgmac.c
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@@ -349,6 +349,7 @@ static int bgmac_dma_rx_read(struct bgma
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struct sk_buff *skb = slot->skb;
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struct bgmac_rx_header *rx;
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u16 len, flags;
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+ int count;
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/* Unmap buffer to make it accessible to the CPU */
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dma_sync_single_for_cpu(dma_dev, slot->dma_addr,
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@@ -357,6 +358,12 @@ static int bgmac_dma_rx_read(struct bgma
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/* Get info from the header */
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rx = (struct bgmac_rx_header *)skb->data;
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len = le16_to_cpu(rx->len);
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+ for (count = 0; count < 200; count++) {
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+ len = le16_to_cpu(rx->len);
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+ if (len)
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+ break;
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+ udelay(1);
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+ }
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flags = le16_to_cpu(rx->flags);
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do {
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@@ -364,7 +371,7 @@ static int bgmac_dma_rx_read(struct bgma
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int err;
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/* Check for poison and drop or pass the packet */
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- if (len == 0xdead && flags == 0xbeef) {
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+ if (!len || (len == 0xdead && flags == 0xbeef)) {
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bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
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ring->start);
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dma_sync_single_for_device(dma_dev,
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