diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0090-net-next-mediatek-fix-off-by-one-in-the-TX-ring-allo.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0090-net-next-mediatek-fix-off-by-one-in-the-TX-ring-allo.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0090-net-next-mediatek-fix-off-by-one-in-the-TX-ring-allo.patch b/target/linux/mediatek/patches-4.4/0090-net-next-mediatek-fix-off-by-one-in-the-TX-ring-allo.patch new file mode 100644 index 0000000000..7a58bfb3e4 --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0090-net-next-mediatek-fix-off-by-one-in-the-TX-ring-allo.patch @@ -0,0 +1,41 @@ +From 94425de9ede5ef0eafbfced65140c30e7c0b6c0d Mon Sep 17 00:00:00 2001 +From: John Crispin <john@phrozen.org> +Date: Tue, 3 May 2016 03:01:13 +0200 +Subject: [PATCH 090/102] net-next: mediatek: fix off by one in the TX ring + allocation + +The TX ring setup has an off by one error causing it to not utilise all +descriptors. This has the side effect that we need to reset the next +pointer at runtime to make it work. Fix the off by one and remove the +code fixing the ring at runtime. + +Signed-off-by: Sean Wang <keyhaede@gmail.com> +Signed-off-by: John Crispin <john@phrozen.org> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +index 52cdb3a..87b48c0 100644 +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -934,7 +934,6 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again) + } + mtk_tx_unmap(eth->dev, tx_buf); + +- ring->last_free->txd2 = next_cpu; + ring->last_free = desc; + atomic_inc(&ring->free_count); + +@@ -1042,7 +1041,7 @@ static int mtk_tx_alloc(struct mtk_eth *eth) + + atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); + ring->next_free = &ring->dma[0]; +- ring->last_free = &ring->dma[MTK_DMA_SIZE - 2]; ++ ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; + ring->thresh = MAX_SKB_FRAGS; + + /* make sure that all changes to the dma ring are flushed before we +-- +1.7.10.4 + |