diff options
Diffstat (limited to 'target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch')
| -rw-r--r-- | target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch | 50 |
1 files changed, 24 insertions, 26 deletions
diff --git a/target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch b/target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch index f708e7dcec..c3d63b65fa 100644 --- a/target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch +++ b/target/linux/generic/patches-3.10/775-bgmac-check-length-of-received-frame.patch @@ -9,33 +9,31 @@ Subject: [PATCH] bgmac: check length of received frame --- 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 +@@ -363,6 +363,27 @@ static int bgmac_dma_rx_read(struct bgma + dma_addr_t old_dma_addr = slot->dma_addr; int err; ++ if (len > BGMAC_RX_MAX_FRAME_SIZE) { ++ struct bgmac_dma_desc *dma_desc = ring->cpu_base + ring->start; ++ ++ bgmac_err(bgmac, "Hardware reported invalid packet length %d for slot %d!\n", len, ring->start); ++ bgmac_err(bgmac, "flags: 0x%04X\n", flags); ++ bgmac_err(bgmac, "ctl0: 0x%08X\tctl1: 0x%08X\n", le32_to_cpu(dma_desc->ctl0), le32_to_cpu(dma_desc->ctl1)); ++ ++ bgmac_err(bgmac, " BGMAC_DMA_RX_CTL: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL)); ++ bgmac_err(bgmac, " BGMAC_DMA_RX_INDEX: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX)); ++ bgmac_err(bgmac, "BGMAC_DMA_RX_RINGLO: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO)); ++ bgmac_err(bgmac, "BGMAC_DMA_RX_RINGHI: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI)); ++ bgmac_err(bgmac, "BGMAC_DMA_RX_STATUS: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS)); ++ bgmac_err(bgmac, " BGMAC_DMA_RX_ERROR: 0x%08X\n", bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_ERROR)); ++ ++ dma_sync_single_for_device(dma_dev, ++ slot->dma_addr, ++ BGMAC_RX_BUF_SIZE, ++ DMA_FROM_DEVICE); ++ break; ++ } ++ /* Check for poison and drop or pass the packet */ -- if (len == 0xdead && flags == 0xbeef) { -+ if (!len || (len == 0xdead && flags == 0xbeef)) { + if (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, |