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| author | Felix Fietkau <nbd@openwrt.org> | 2015-04-12 22:10:40 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2015-04-12 22:10:40 +0000 |
| commit | afafbc0d7454cb3271477698782cdf3197d06295 (patch) | |
| tree | 0cf5aeb23108f087330c144a02e97f0aa48d2bae /target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch | |
| parent | 09722d0bdcce6a021ec20bdefc158878ce49b8dc (diff) | |
| download | upstream-afafbc0d7454cb3271477698782cdf3197d06295.tar.gz upstream-afafbc0d7454cb3271477698782cdf3197d06295.tar.bz2 upstream-afafbc0d7454cb3271477698782cdf3197d06295.zip | |
kernel: bgmac: add more DMA related fixes
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 45407
Diffstat (limited to 'target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch b/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch new file mode 100644 index 0000000000..fa45a43686 --- /dev/null +++ b/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch @@ -0,0 +1,28 @@ +From: Felix Fietkau <nbd@openwrt.org> +Date: Sun, 12 Apr 2015 22:28:20 +0200 +Subject: [PATCH] bgmac: add check for oversized packets + +In very rare cases, the MAC can catch an internal buffer that is bigger +than it's supposed to be. Instead of crashing the kernel, simply pass +the buffer back to the hardware + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +--- + +--- a/drivers/net/ethernet/broadcom/bgmac.c ++++ b/drivers/net/ethernet/broadcom/bgmac.c +@@ -422,6 +422,14 @@ static int bgmac_dma_rx_read(struct bgma + break; + } + ++ if (len > BGMAC_RX_ALLOC_SIZE) { ++ bgmac_err(bgmac, "Found oversized packet at slot %d, DMA issue!\n", ++ ring->start); ++ rx->len = cpu_to_le16(0xdead); ++ rx->flags = cpu_to_le16(0xbeef); ++ break; ++ } ++ + /* Omit CRC. */ + len -= ETH_FCS_LEN; + |