kernel: remove linux 4.0 support

[openwrt/staging/chunkeey.git] / target / linux / generic / patches-4.0 / 072-11-bgmac-fix-DMA-rx-corruption.patch

diff --git a/target/linux/generic/patches-4.0/072-11-bgmac-fix-DMA-rx-corruption.patch b/target/linux/generic/patches-4.0/072-11-bgmac-fix-DMA-rx-corruption.patch
deleted file mode 100644 (file)
index 2e670d8..0000000
--- a/target/linux/generic/patches-4.0/072-11-bgmac-fix-DMA-rx-corruption.patch
+++ /dev/null
@@ -1,88 +0,0 @@
-From: Felix Fietkau <nbd@openwrt.org>
-Date: Sun, 12 Apr 2015 11:59:47 +0200
-Subject: [PATCH] bgmac: fix DMA rx corruption
-
-The driver needs to inform the hardware about the first invalid (not yet
-filled) rx slot, by writing its DMA descriptor pointer offset to the
-BGMAC_DMA_RX_INDEX register.
-
-This register was set to a value exceeding the rx ring size, effectively
-allowing the hardware constant access to the full ring, regardless of
-which slots are initialized.
-
-To fix this issue, always mark the last filled rx slot as invalid.
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
----
-
---- a/drivers/net/ethernet/broadcom/bgmac.c
-+++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -366,6 +366,16 @@ static int bgmac_dma_rx_skb_for_slot(str
-       return 0;
- }
- 
-+static void bgmac_dma_rx_update_index(struct bgmac *bgmac,
-+                                    struct bgmac_dma_ring *ring)
-+{
-+      wmb();
-+
-+      bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
-+                  ring->index_base +
-+                  ring->end * sizeof(struct bgmac_dma_desc));
-+}
-+
- static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac,
-                                   struct bgmac_dma_ring *ring, int desc_idx)
- {
-@@ -384,6 +394,8 @@ static void bgmac_dma_rx_setup_desc(stru
-       dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[desc_idx].dma_addr));
-       dma_desc->ctl0 = cpu_to_le32(ctl0);
-       dma_desc->ctl1 = cpu_to_le32(ctl1);
-+
-+      ring->end = desc_idx;
- }
- 
- static void bgmac_dma_rx_poison_buf(struct device *dma_dev,
-@@ -411,9 +423,7 @@ static int bgmac_dma_rx_read(struct bgma
-       end_slot &= BGMAC_DMA_RX_STATDPTR;
-       end_slot /= sizeof(struct bgmac_dma_desc);
- 
--      ring->end = end_slot;
--
--      while (ring->start != ring->end) {
-+      while (ring->start != end_slot) {
-               struct device *dma_dev = bgmac->core->dma_dev;
-               struct bgmac_slot_info *slot = &ring->slots[ring->start];
-               struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
-@@ -476,6 +486,8 @@ static int bgmac_dma_rx_read(struct bgma
-                       break;
-       }
- 
-+      bgmac_dma_rx_update_index(bgmac, ring);
-+
-       return handled;
- }
- 
-@@ -695,6 +707,8 @@ static int bgmac_dma_init(struct bgmac *
-               if (ring->unaligned)
-                       bgmac_dma_rx_enable(bgmac, ring);
- 
-+              ring->start = 0;
-+              ring->end = 0;
-               for (j = 0; j < ring->num_slots; j++) {
-                       err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
-                       if (err)
-@@ -703,12 +717,7 @@ static int bgmac_dma_init(struct bgmac *
-                       bgmac_dma_rx_setup_desc(bgmac, ring, j);
-               }
- 
--              bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
--                          ring->index_base +
--                          ring->num_slots * sizeof(struct bgmac_dma_desc));
--
--              ring->start = 0;
--              ring->end = 0;
-+              bgmac_dma_rx_update_index(bgmac, ring);
-       }
- 
-       return 0;