target/linux/generic/patches-4.4/074-0001-net-bgmac-Fix-SOF-bit-checking.patch

   1 From d2b13233879ca1268a1c027d4573109e5a777811 Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <f.fainelli@gmail.com>
   3 Date: Thu, 23 Jun 2016 14:23:12 -0700
   4 Subject: [PATCH 1/3] net: bgmac: Fix SOF bit checking
   5
   6 We are checking for the Start of Frame bit in the ctl1 word, while this
   7 bit is set in the ctl0 word instead. Read the ctl0 word and update the
   8 check to verify that.
   9
  10 Fixes: 9cde94506eac ("bgmac: implement scatter/gather support")
  11 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/ethernet/broadcom/bgmac.c | 5 +++--
  15  1 file changed, 3 insertions(+), 2 deletions(-)
  16
  17 --- a/drivers/net/ethernet/broadcom/bgmac.c
  18 +++ b/drivers/net/ethernet/broadcom/bgmac.c
  19 @@ -269,15 +269,16 @@ static void bgmac_dma_tx_free(struct bgm
  20         while (ring->start != ring->end) {
  21                 int slot_idx = ring->start % BGMAC_TX_RING_SLOTS;
  22                 struct bgmac_slot_info *slot = &ring->slots[slot_idx];
  23 -               u32 ctl1;
  24 +               u32 ctl0, ctl1;
  25                 int len;
  26
  27                 if (slot_idx == empty_slot)
  28                         break;
  29
  30 +               ctl0 = le32_to_cpu(ring->cpu_base[slot_idx].ctl0);
  31                 ctl1 = le32_to_cpu(ring->cpu_base[slot_idx].ctl1);
  32                 len = ctl1 & BGMAC_DESC_CTL1_LEN;
  33 -               if (ctl1 & BGMAC_DESC_CTL0_SOF)
  34 +               if (ctl0 & BGMAC_DESC_CTL0_SOF)
  35                         /* Unmap no longer used buffer */
  36                         dma_unmap_single(dma_dev, slot->dma_addr, len,
  37                                          DMA_TO_DEVICE);