kernel: bgmac: add more DMA related fixes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45407 3c298f89-4303-0410-b956-a3cf2f4a3e73

8 files changed, 428 insertions, 48 deletions

diff --git a/target/linux/generic/patches-3.18/077-07-bgmac-simplify-rx-DMA-error-handling.patch b/target/linux/generic/patches-3.18/077-07-bgmac-simplify-rx-DMA-error-handling.patch
new file mode 100644
index 0000000000..f26e42c20d
--- /dev/null
+++ b/target/linux/generic/patches-3.18/077-07-bgmac-simplify-rx-DMA-error-handling.patch
@@ -0,0 +1,68 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 12 Apr 2015 22:23:07 +0200
+Subject: [PATCH] bgmac: simplify rx DMA error handling
+
+Unmap the DMA buffer before checking it. If it is poisoned, map it again
+and pass it back to the hardware.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -405,25 +405,20 @@ static int bgmac_dma_rx_read(struct bgma
+ 		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);
++		dma_unmap_single(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;
+ 
+ 			/* 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);
+ 				break;
+ 			}
+ 
+@@ -436,18 +431,8 @@ static int bgmac_dma_rx_read(struct bgma
+ 				/* 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 +
+@@ -461,6 +446,8 @@ 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;
+ 
diff --git a/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch b/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch
new file mode 100644
index 0000000000..fa45a43686
--- /dev/null
+++ b/target/linux/generic/patches-3.18/077-08-bgmac-add-check-for-oversized-packets.patch
@@ -0,0 +1,28 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 12 Apr 2015 22:28:20 +0200
+Subject: [PATCH] bgmac: add check for oversized packets
+
+In very rare cases, the MAC can catch an internal buffer that is bigger
+than it's supposed to be. Instead of crashing the kernel, simply pass
+the buffer back to the hardware
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -422,6 +422,14 @@ static int bgmac_dma_rx_read(struct bgma
+ 				break;
+ 			}
+ 
++			if (len > BGMAC_RX_ALLOC_SIZE) {
++				bgmac_err(bgmac, "Found oversized packet at slot %d, DMA issue!\n",
++					  ring->start);
++				rx->len = cpu_to_le16(0xdead);
++				rx->flags = cpu_to_le16(0xbeef);
++				break;
++			}
++
+ 			/* Omit CRC. */
+ 			len -= ETH_FCS_LEN;
+ 
diff --git a/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch b/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch
new file mode 100644
index 0000000000..4888cc32af
--- /dev/null
+++ b/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch
@@ -0,0 +1,23 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 12 Apr 2015 22:36:16 +0200
+Subject: [PATCH] bgmac: increase rx ring size from 511 to 512
+
+Limiting it to 511 looks like a failed attempt at leaving one descriptor
+empty to allow the hardware to stop processing a buffer that has not
+been prepared yet. However, this doesn't work because this affects the
+total ring size as well
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/ethernet/broadcom/bgmac.h
++++ b/drivers/net/ethernet/broadcom/bgmac.h
+@@ -356,7 +356,7 @@
+ #define BGMAC_MAX_RX_RINGS			1
+ 
+ #define BGMAC_TX_RING_SLOTS			128
+-#define BGMAC_RX_RING_SLOTS			512 - 1		/* Why -1? Well, Broadcom does that... */
++#define BGMAC_RX_RING_SLOTS			512
+ 
+ #define BGMAC_RX_HEADER_LEN			28		/* Last 24 bytes are unused. Well... */
+ #define BGMAC_RX_FRAME_OFFSET			30		/* There are 2 unused bytes between header and real data */
diff --git a/target/linux/generic/patches-3.18/077-10-bgmac-simplify-dma-init-cleanup.patch b/target/linux/generic/patches-3.18/077-10-bgmac-simplify-dma-init-cleanup.patch
new file mode 100644
index 0000000000..be68fa7269
--- /dev/null
+++ b/target/linux/generic/patches-3.18/077-10-bgmac-simplify-dma-init-cleanup.patch
@@ -0,0 +1,164 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 12 Apr 2015 23:19:32 +0200
+Subject: [PATCH] bgmac: simplify dma init/cleanup
+
+Instead of allocating buffers at device init time and initializing
+descriptors at device open, do both at the same time (during open).
+Free all buffers when closing the device.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -549,18 +549,26 @@ static void bgmac_dma_ring_desc_free(str
+ 			  ring->dma_base);
+ }
+ 
+-static void bgmac_dma_free(struct bgmac *bgmac)
++static void bgmac_dma_cleanup(struct bgmac *bgmac)
+ {
+ 	int i;
+ 
+-	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
++	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
+ 		bgmac_dma_tx_ring_free(bgmac, &bgmac->tx_ring[i]);
+-		bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i]);
+-	}
+-	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
++
++	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
+ 		bgmac_dma_rx_ring_free(bgmac, &bgmac->rx_ring[i]);
++}
++
++static void bgmac_dma_free(struct bgmac *bgmac)
++{
++	int i;
++
++	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
++		bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i]);
++
++	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
+ 		bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i]);
+-	}
+ }
+ 
+ static int bgmac_dma_alloc(struct bgmac *bgmac)
+@@ -608,8 +616,6 @@ static int bgmac_dma_alloc(struct bgmac 
+ 	}
+ 
+ 	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
+-		int j;
+-
+ 		ring = &bgmac->rx_ring[i];
+ 		ring->num_slots = BGMAC_RX_RING_SLOTS;
+ 		ring->mmio_base = ring_base[i];
+@@ -632,15 +638,6 @@ static int bgmac_dma_alloc(struct bgmac 
+ 			ring->index_base = lower_32_bits(ring->dma_base);
+ 		else
+ 			ring->index_base = 0;
+-
+-		/* Alloc RX slots */
+-		for (j = 0; j < ring->num_slots; j++) {
+-			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
+-			if (err) {
+-				bgmac_err(bgmac, "Can't allocate skb for slot in RX ring\n");
+-				goto err_dma_free;
+-			}
+-		}
+ 	}
+ 
+ 	return 0;
+@@ -650,10 +647,10 @@ err_dma_free:
+ 	return -ENOMEM;
+ }
+ 
+-static void bgmac_dma_init(struct bgmac *bgmac)
++static int bgmac_dma_init(struct bgmac *bgmac)
+ {
+ 	struct bgmac_dma_ring *ring;
+-	int i;
++	int i, err;
+ 
+ 	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
+ 		ring = &bgmac->tx_ring[i];
+@@ -685,8 +682,13 @@ static void bgmac_dma_init(struct bgmac 
+ 		if (ring->unaligned)
+ 			bgmac_dma_rx_enable(bgmac, ring);
+ 
+-		for (j = 0; j < ring->num_slots; j++)
++		for (j = 0; j < ring->num_slots; j++) {
++			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
++			if (err)
++				return err;
++
+ 			bgmac_dma_rx_setup_desc(bgmac, ring, j);
++		}
+ 
+ 		bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
+ 			    ring->index_base +
+@@ -695,6 +697,8 @@ static void bgmac_dma_init(struct bgmac 
+ 		ring->start = 0;
+ 		ring->end = 0;
+ 	}
++
++	return 0;
+ }
+ 
+ /**************************************************
+@@ -1170,11 +1174,8 @@ static void bgmac_enable(struct bgmac *b
+ }
+ 
+ /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
+-static void bgmac_chip_init(struct bgmac *bgmac, bool full_init)
++static void bgmac_chip_init(struct bgmac *bgmac)
+ {
+-	struct bgmac_dma_ring *ring;
+-	int i;
+-
+ 	/* 1 interrupt per received frame */
+ 	bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
+ 
+@@ -1192,16 +1193,7 @@ static void bgmac_chip_init(struct bgmac
+ 
+ 	bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN);
+ 
+-	if (full_init) {
+-		bgmac_dma_init(bgmac);
+-		if (1) /* FIXME: is there any case we don't want IRQs? */
+-			bgmac_chip_intrs_on(bgmac);
+-	} else {
+-		for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
+-			ring = &bgmac->rx_ring[i];
+-			bgmac_dma_rx_enable(bgmac, ring);
+-		}
+-	}
++	bgmac_chip_intrs_on(bgmac);
+ 
+ 	bgmac_enable(bgmac);
+ }
+@@ -1261,8 +1253,15 @@ static int bgmac_open(struct net_device 
+ 	int err = 0;
+ 
+ 	bgmac_chip_reset(bgmac);
++
++	err = bgmac_dma_init(bgmac);
++	if (err) {
++		bgmac_dma_cleanup(bgmac);
++		return err;
++	}
++
+ 	/* Specs say about reclaiming rings here, but we do that in DMA init */
+-	bgmac_chip_init(bgmac, true);
++	bgmac_chip_init(bgmac);
+ 
+ 	err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED,
+ 			  KBUILD_MODNAME, net_dev);
+@@ -1293,6 +1292,7 @@ static int bgmac_stop(struct net_device 
+ 	free_irq(bgmac->core->irq, net_dev);
+ 
+ 	bgmac_chip_reset(bgmac);
++	bgmac_dma_cleanup(bgmac);
+ 
+ 	return 0;
+ }
diff --git a/target/linux/generic/patches-3.18/077-07-bgmac-fix-DMA-rx-corruption.patch b/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch
index 5cf34e5cf5..5f5fe93703 100644
--- a/target/linux/generic/patches-3.18/077-07-bgmac-fix-DMA-rx-corruption.patch
+++ b/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch
@@ -10,7 +10,7 @@ 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.
 
-Fix this by updating the register in bgmac_dma_rx_setup_desc.
+To fix this issue, always mark the last filled rx slot as invalid.
 
 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 ---
@@ -39,7 +39,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	dma_desc->ctl0 = cpu_to_le32(ctl0);
  	dma_desc->ctl1 = cpu_to_le32(ctl1);
 +
-+	ring->end = (desc_idx + 1) % BGMAC_RX_RING_SLOTS;
++	ring->end = desc_idx;
  }
  
  static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
@@ -54,7 +54,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		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;
-@@ -468,6 +478,8 @@ static int bgmac_dma_rx_read(struct bgma
+@@ -463,6 +473,8 @@ static int bgmac_dma_rx_read(struct bgma
  			break;
  	}
  
@@ -63,14 +63,18 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	return handled;
  }
  
-@@ -690,15 +702,12 @@ static void bgmac_dma_init(struct bgmac 
+@@ -682,6 +694,8 @@ 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++)
+ 		for (j = 0; j < ring->num_slots; j++) {
+ 			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
+ 			if (err)
+@@ -690,12 +704,7 @@ 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 +
@@ -80,5 +84,5 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 -		ring->end = 0;
 +		bgmac_dma_rx_update_index(bgmac, ring);
  	}
- }
  
+ 	return 0;
diff --git a/target/linux/generic/patches-3.18/077-12-bgmac-drop-ring-num_slots.patch b/target/linux/generic/patches-3.18/077-12-bgmac-drop-ring-num_slots.patch
new file mode 100644
index 0000000000..7525b63d6a
--- /dev/null
+++ b/target/linux/generic/patches-3.18/077-12-bgmac-drop-ring-num_slots.patch
@@ -0,0 +1,132 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 12 Apr 2015 23:28:38 +0200
+Subject: [PATCH] bgmac: drop ring->num_slots
+
+The ring size is always known at compile time, so make the code a bit
+more efficient
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -123,7 +123,7 @@ bgmac_dma_tx_add_buf(struct bgmac *bgmac
+ 	struct bgmac_dma_desc *dma_desc;
+ 	u32 ctl1;
+ 
+-	if (i == ring->num_slots - 1)
++	if (i == BGMAC_TX_RING_SLOTS - 1)
+ 		ctl0 |= BGMAC_DESC_CTL0_EOT;
+ 
+ 	ctl1 = len & BGMAC_DESC_CTL1_LEN;
+@@ -378,7 +378,7 @@ static void bgmac_dma_rx_setup_desc(stru
+ 	struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
+ 	u32 ctl0 = 0, ctl1 = 0;
+ 
+-	if (desc_idx == ring->num_slots - 1)
++	if (desc_idx == BGMAC_RX_RING_SLOTS - 1)
+ 		ctl0 |= BGMAC_DESC_CTL0_EOT;
+ 	ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
+ 	/* Is there any BGMAC device that requires extension? */
+@@ -508,7 +508,7 @@ static void bgmac_dma_tx_ring_free(struc
+ 	struct bgmac_slot_info *slot;
+ 	int i;
+ 
+-	for (i = 0; i < ring->num_slots; i++) {
++	for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) {
+ 		int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
+ 
+ 		slot = &ring->slots[i];
+@@ -533,7 +533,7 @@ static void bgmac_dma_rx_ring_free(struc
+ 	struct bgmac_slot_info *slot;
+ 	int i;
+ 
+-	for (i = 0; i < ring->num_slots; i++) {
++	for (i = 0; i < BGMAC_RX_RING_SLOTS; i++) {
+ 		slot = &ring->slots[i];
+ 		if (!slot->buf)
+ 			continue;
+@@ -547,7 +547,8 @@ static void bgmac_dma_rx_ring_free(struc
+ }
+ 
+ static void bgmac_dma_ring_desc_free(struct bgmac *bgmac,
+-				     struct bgmac_dma_ring *ring)
++				     struct bgmac_dma_ring *ring,
++				     int num_slots)
+ {
+ 	struct device *dma_dev = bgmac->core->dma_dev;
+ 	int size;
+@@ -556,7 +557,7 @@ static void bgmac_dma_ring_desc_free(str
+ 	    return;
+ 
+ 	/* Free ring of descriptors */
+-	size = ring->num_slots * sizeof(struct bgmac_dma_desc);
++	size = num_slots * sizeof(struct bgmac_dma_desc);
+ 	dma_free_coherent(dma_dev, size, ring->cpu_base,
+ 			  ring->dma_base);
+ }
+@@ -577,10 +578,12 @@ static void bgmac_dma_free(struct bgmac 
+ 	int i;
+ 
+ 	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
+-		bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i]);
++		bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i],
++					 BGMAC_TX_RING_SLOTS);
+ 
+ 	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
+-		bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i]);
++		bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i],
++					 BGMAC_RX_RING_SLOTS);
+ }
+ 
+ static int bgmac_dma_alloc(struct bgmac *bgmac)
+@@ -603,11 +606,10 @@ static int bgmac_dma_alloc(struct bgmac 
+ 
+ 	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
+ 		ring = &bgmac->tx_ring[i];
+-		ring->num_slots = BGMAC_TX_RING_SLOTS;
+ 		ring->mmio_base = ring_base[i];
+ 
+ 		/* Alloc ring of descriptors */
+-		size = ring->num_slots * sizeof(struct bgmac_dma_desc);
++		size = BGMAC_TX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
+ 		ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
+ 						     &ring->dma_base,
+ 						     GFP_KERNEL);
+@@ -629,11 +631,10 @@ static int bgmac_dma_alloc(struct bgmac 
+ 
+ 	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
+ 		ring = &bgmac->rx_ring[i];
+-		ring->num_slots = BGMAC_RX_RING_SLOTS;
+ 		ring->mmio_base = ring_base[i];
+ 
+ 		/* Alloc ring of descriptors */
+-		size = ring->num_slots * sizeof(struct bgmac_dma_desc);
++		size = BGMAC_RX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
+ 		ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
+ 						     &ring->dma_base,
+ 						     GFP_KERNEL);
+@@ -696,7 +697,7 @@ static int bgmac_dma_init(struct bgmac *
+ 
+ 		ring->start = 0;
+ 		ring->end = 0;
+-		for (j = 0; j < ring->num_slots; j++) {
++		for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) {
+ 			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
+ 			if (err)
+ 				return err;
+--- a/drivers/net/ethernet/broadcom/bgmac.h
++++ b/drivers/net/ethernet/broadcom/bgmac.h
+@@ -419,11 +419,10 @@ struct bgmac_dma_ring {
+ 	u32 start;
+ 	u32 end;
+ 
+-	u16 num_slots;
+-	u16 mmio_base;
+ 	struct bgmac_dma_desc *cpu_base;
+ 	dma_addr_t dma_base;
+ 	u32 index_base; /* Used for unaligned rings only, otherwise 0 */
++	u16 mmio_base;
+ 	bool unaligned;
+ 
+ 	struct bgmac_slot_info slots[BGMAC_RX_RING_SLOTS];
diff --git a/target/linux/generic/patches-3.18/773-bgmac-add-srab-switch.patch b/target/linux/generic/patches-3.18/773-bgmac-add-srab-switch.patch
index 2f9dce8c75..2219f85f3c 100644
--- a/target/linux/generic/patches-3.18/773-bgmac-add-srab-switch.patch
+++ b/target/linux/generic/patches-3.18/773-bgmac-add-srab-switch.patch
@@ -12,7 +12,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  #include <bcm47xx_nvram.h>
  
  static const struct bcma_device_id bgmac_bcma_tbl[] = {
-@@ -1538,6 +1539,17 @@ static void bgmac_mii_unregister(struct
+@@ -1524,6 +1525,17 @@ static void bgmac_mii_unregister(struct 
  	mdiobus_free(mii_bus);
  }
  
@@ -30,7 +30,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  /**************************************************
   * BCMA bus ops
   **************************************************/
-@@ -1661,6 +1673,16 @@ static int bgmac_probe(struct bcma_devic
+@@ -1647,6 +1659,16 @@ static int bgmac_probe(struct bcma_devic
  	net_dev->hw_features = net_dev->features;
  	net_dev->vlan_features = net_dev->features;
  
@@ -47,7 +47,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  	err = register_netdev(bgmac->net_dev);
  	if (err) {
  		bgmac_err(bgmac, "Cannot register net device\n");
-@@ -1687,6 +1709,10 @@ static void bgmac_remove(struct bcma_dev
+@@ -1673,6 +1695,10 @@ static void bgmac_remove(struct bcma_dev
  {
  	struct bgmac *bgmac = bcma_get_drvdata(core);
  
diff --git a/target/linux/generic/patches-3.18/775-bgmac-check-length-of-received-frame.patch b/target/linux/generic/patches-3.18/775-bgmac-check-length-of-received-frame.patch
deleted file mode 100644
index 2be1c3676d..0000000000
--- a/target/linux/generic/patches-3.18/775-bgmac-check-length-of-received-frame.patch
+++ /dev/null
@@ -1,39 +0,0 @@
-From 2d12a9abf3f81de5b51852e3cfcba8cedac82642 Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Fri, 6 Dec 2013 01:14:52 +0100
-Subject: [PATCH] bgmac: check length of received frame
-
----
- drivers/net/ethernet/broadcom/bgmac.c |    9 ++++++++-
- 1 file changed, 8 insertions(+), 1 deletion(-)
-
---- a/drivers/net/ethernet/broadcom/bgmac.c
-+++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -427,6 +427,27 @@ 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) {
- 				bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",