1 files changed, 0 insertions, 130 deletions
diff --git a/target/linux/generic/patches-4.0/072-07-bgmac-simplify-rx-DMA-error-handling.patch b/target/linux/generic/patches-4.0/072-07-bgmac-simplify-rx-DMA-error-handling.patch
deleted file mode 100644
index 2ca9d10f63..0000000000
--- a/target/linux/generic/patches-4.0/072-07-bgmac-simplify-rx-DMA-error-handling.patch
+++ /dev/null
@@ -1,130 +0,0 @@
-From: Felix Fietkau <nbd@openwrt.org>
-Date: Sun, 12 Apr 2015 22:23:07 +0200
-Subject: [PATCH] bgmac: simplify/optimize rx DMA error handling
-
-Allocate a new buffer before processing the completed one. If allocation
-fails, reuse the old buffer.
-
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
----
-
---- a/drivers/net/ethernet/broadcom/bgmac.c
-+++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -386,6 +386,19 @@ static void bgmac_dma_rx_setup_desc(stru
- 	dma_desc->ctl1 = cpu_to_le32(ctl1);
- }
- 
-+static void bgmac_dma_rx_poison_buf(struct device *dma_dev,
-+				    struct bgmac_slot_info *slot)
-+{
-+	struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
-+
-+	dma_sync_single_for_cpu(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
-+				DMA_FROM_DEVICE);
-+	rx->len = cpu_to_le16(0xdead);
-+	rx->flags = cpu_to_le16(0xbeef);
-+	dma_sync_single_for_device(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
-+				   DMA_FROM_DEVICE);
-+}
-+
- static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
- 			     int weight)
- {
-@@ -406,53 +419,35 @@ static int bgmac_dma_rx_read(struct bgma
- 		struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
- 		struct sk_buff *skb;
- 		void *buf = slot->buf;
-+		dma_addr_t dma_addr = slot->dma_addr;
- 		u16 len, flags;
- 
--		/* Unmap buffer to make it accessible to the CPU */
--		dma_sync_single_for_cpu(dma_dev, slot->dma_addr,
--					BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
--
--		/* Get info from the header */
--		len = le16_to_cpu(rx->len);
--		flags = le16_to_cpu(rx->flags);
--
- 		do {
--			dma_addr_t old_dma_addr = slot->dma_addr;
--			int err;
-+			/* Prepare new skb as replacement */
-+			if (bgmac_dma_rx_skb_for_slot(bgmac, slot)) {
-+				bgmac_dma_rx_poison_buf(dma_dev, slot);
-+				break;
-+			}
-+
-+			/* Unmap buffer to make it accessible to the CPU */
-+			dma_unmap_single(dma_dev, dma_addr,
-+					 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
-+
-+			/* Get info from the header */
-+			len = le16_to_cpu(rx->len);
-+			flags = le16_to_cpu(rx->flags);
- 
- 			/* Check for poison and drop or pass the packet */
- 			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,
--							   slot->dma_addr,
--							   BGMAC_RX_BUF_SIZE,
--							   DMA_FROM_DEVICE);
-+				put_page(virt_to_head_page(buf));
- 				break;
- 			}
- 
- 			/* Omit CRC. */
- 			len -= ETH_FCS_LEN;
- 
--			/* Prepare new skb as replacement */
--			err = bgmac_dma_rx_skb_for_slot(bgmac, slot);
--			if (err) {
--				/* Poison the old skb */
--				rx->len = cpu_to_le16(0xdead);
--				rx->flags = cpu_to_le16(0xbeef);
--
--				dma_sync_single_for_device(dma_dev,
--							   slot->dma_addr,
--							   BGMAC_RX_BUF_SIZE,
--							   DMA_FROM_DEVICE);
--				break;
--			}
--			bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
--
--			/* Unmap old skb, we'll pass it to the netfif */
--			dma_unmap_single(dma_dev, old_dma_addr,
--					 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
--
- 			skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
- 			skb_put(skb, BGMAC_RX_FRAME_OFFSET +
- 				BGMAC_RX_BUF_OFFSET + len);
-@@ -465,6 +460,8 @@ static int bgmac_dma_rx_read(struct bgma
- 			handled++;
- 		} while (0);
- 
-+		bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
-+
- 		if (++ring->start >= BGMAC_RX_RING_SLOTS)
- 			ring->start = 0;
- 
-@@ -532,14 +529,14 @@ static void bgmac_dma_rx_ring_free(struc
- 
- 	for (i = 0; i < ring->num_slots; i++) {
- 		slot = &ring->slots[i];
--		if (!slot->buf)
-+		if (!slot->dma_addr)
- 			continue;
- 
--		if (slot->dma_addr)
--			dma_unmap_single(dma_dev, slot->dma_addr,
--					 BGMAC_RX_BUF_SIZE,
--					 DMA_FROM_DEVICE);
-+		dma_unmap_single(dma_dev, slot->dma_addr,
-+				 BGMAC_RX_BUF_SIZE,
-+				 DMA_FROM_DEVICE);
- 		put_page(virt_to_head_page(slot->buf));
-+		slot->dma_addr = 0;
- 	}
- }
-