kernel: update bgmac patches to the latest version submitted

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

SVN-Revision: 45431

10 files changed, 102 insertions, 80 deletions

diff --git a/target/linux/generic/patches-3.18/077-04-bgmac-simplify-tx-ring-index-handling.patch b/target/linux/generic/patches-3.18/077-04-bgmac-simplify-tx-ring-index-handling.patch
index cf62a50a2f..241a3083a9 100644
--- a/target/linux/generic/patches-3.18/077-04-bgmac-simplify-tx-ring-index-handling.patch
+++ b/target/linux/generic/patches-3.18/077-04-bgmac-simplify-tx-ring-index-handling.patch
@@ -25,22 +25,24 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	int i;
  
  	if (skb->len > BGMAC_DESC_CTL1_LEN) {
-@@ -158,13 +157,7 @@ static netdev_tx_t bgmac_dma_tx_add(stru
- 		skb_checksum_help(skb);
+@@ -159,12 +158,10 @@ static netdev_tx_t bgmac_dma_tx_add(stru
  
  	nr_frags = skb_shinfo(skb)->nr_frags;
--
+ 
 -	if (ring->start <= ring->end)
 -		free_slots = ring->start - ring->end + BGMAC_TX_RING_SLOTS;
 -	else
 -		free_slots = ring->start - ring->end;
 -
 -	if (free_slots <= nr_frags + 1) {
++	/* ring->end - ring->start will return the number of valid slots,
++	 * even when ring->end overflows
++	 */
 +	if (ring->end - ring->start + nr_frags + 1 >= BGMAC_TX_RING_SLOTS) {
  		bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n");
  		netif_stop_queue(net_dev);
  		return NETDEV_TX_BUSY;
-@@ -200,7 +193,7 @@ static netdev_tx_t bgmac_dma_tx_add(stru
+@@ -200,7 +197,7 @@ static netdev_tx_t bgmac_dma_tx_add(stru
  	}
  
  	slot->skb = skb;
@@ -49,7 +51,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	netdev_sent_queue(net_dev, skb->len);
  
  	wmb();
-@@ -208,13 +201,12 @@ static netdev_tx_t bgmac_dma_tx_add(stru
+@@ -208,13 +205,12 @@ static netdev_tx_t bgmac_dma_tx_add(stru
  	/* Increase ring->end to point empty slot. We tell hardware the first
  	 * slot it should *not* read.
  	 */
@@ -66,7 +68,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		netif_stop_queue(net_dev);
  
  	return NETDEV_TX_OK;
-@@ -256,17 +248,17 @@ static void bgmac_dma_tx_free(struct bgm
+@@ -256,17 +252,17 @@ static void bgmac_dma_tx_free(struct bgm
  	empty_slot &= BGMAC_DMA_TX_STATDPTR;
  	empty_slot /= sizeof(struct bgmac_dma_desc);
  
@@ -93,7 +95,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		if (ctl1 & BGMAC_DESC_CTL0_SOF)
  			/* Unmap no longer used buffer */
  			dma_unmap_single(dma_dev, slot->dma_addr, len,
-@@ -284,10 +276,8 @@ static void bgmac_dma_tx_free(struct bgm
+@@ -284,10 +280,8 @@ static void bgmac_dma_tx_free(struct bgm
  			slot->skb = NULL;
  		}
  
diff --git a/target/linux/generic/patches-3.18/077-05-bgmac-leave-interrupts-disabled-as-long-as-there-is-.patch b/target/linux/generic/patches-3.18/077-05-bgmac-leave-interrupts-disabled-as-long-as-there-is-.patch
index 7118d0d145..3bbe9ea9cb 100644
--- a/target/linux/generic/patches-3.18/077-05-bgmac-leave-interrupts-disabled-as-long-as-there-is-.patch
+++ b/target/linux/generic/patches-3.18/077-05-bgmac-leave-interrupts-disabled-as-long-as-there-is-.patch
@@ -15,7 +15,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -1105,8 +1105,6 @@ static void bgmac_chip_reset(struct bgma
+@@ -1109,8 +1109,6 @@ static void bgmac_chip_reset(struct bgma
  	bgmac_phy_init(bgmac);
  
  	netdev_reset_queue(bgmac->net_dev);
@@ -24,7 +24,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  }
  
  static void bgmac_chip_intrs_on(struct bgmac *bgmac)
-@@ -1221,14 +1219,13 @@ static irqreturn_t bgmac_interrupt(int i
+@@ -1225,14 +1223,13 @@ static irqreturn_t bgmac_interrupt(int i
  	if (!int_status)
  		return IRQ_NONE;
  
@@ -42,7 +42,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	napi_schedule(&bgmac->napi);
  
  	return IRQ_HANDLED;
-@@ -1237,25 +1234,17 @@ static irqreturn_t bgmac_interrupt(int i
+@@ -1241,25 +1238,17 @@ static irqreturn_t bgmac_interrupt(int i
  static int bgmac_poll(struct napi_struct *napi, int weight)
  {
  	struct bgmac *bgmac = container_of(napi, struct bgmac, napi);
diff --git a/target/linux/generic/patches-3.18/077-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch b/target/linux/generic/patches-3.18/077-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch
index e7fde163fd..2c490efbbb 100644
--- a/target/linux/generic/patches-3.18/077-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch
+++ b/target/linux/generic/patches-3.18/077-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch
@@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -342,13 +342,13 @@ static int bgmac_dma_rx_skb_for_slot(str
+@@ -346,13 +346,13 @@ static int bgmac_dma_rx_skb_for_slot(str
  		return -ENOMEM;
  
  	/* Poison - if everything goes fine, hardware will overwrite it */
@@ -27,7 +27,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	if (dma_mapping_error(dma_dev, dma_addr)) {
  		bgmac_err(bgmac, "DMA mapping error\n");
  		put_page(virt_to_head_page(buf));
-@@ -399,7 +399,7 @@ static int bgmac_dma_rx_read(struct bgma
+@@ -403,7 +403,7 @@ static int bgmac_dma_rx_read(struct bgma
  	while (ring->start != ring->end) {
  		struct device *dma_dev = bgmac->core->dma_dev;
  		struct bgmac_slot_info *slot = &ring->slots[ring->start];
@@ -36,7 +36,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		struct sk_buff *skb;
  		void *buf = slot->buf;
  		u16 len, flags;
-@@ -450,8 +450,10 @@ static int bgmac_dma_rx_read(struct bgma
+@@ -454,8 +454,10 @@ static int bgmac_dma_rx_read(struct bgma
  					 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
  
  			skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
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
index d6feed05b2..2ca9d10f63 100644
--- 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
@@ -1,19 +1,40 @@
 From: Felix Fietkau <nbd@openwrt.org>
 Date: Sun, 12 Apr 2015 22:23:07 +0200
-Subject: [PATCH] bgmac: simplify rx DMA error handling
+Subject: [PATCH] bgmac: simplify/optimize rx DMA error handling
 
-Unmap the DMA buffer before checking it. If an error occurs, free the
-buffer and allocate a new one. If allocation or mapping fails, retry as
-long as there is NAPI poll budget left (count every attempt instead of
-every frame).
+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
-@@ -404,51 +404,33 @@ static int bgmac_dma_rx_read(struct bgma
+@@ -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 */
@@ -23,19 +44,19 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 -		/* Get info from the header */
 -		len = le16_to_cpu(rx->len);
 -		flags = le16_to_cpu(rx->flags);
-+		if (++handled >= weight - 1) /* Should never be greater */
-+			break;
- 
+-
  		do {
 -			dma_addr_t old_dma_addr = slot->dma_addr;
 -			int err;
-+			if (!slot->dma_addr)
++			/* 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, slot->dma_addr,
++			dma_unmap_single(dma_dev, dma_addr,
 +					 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
-+			slot->dma_addr = 0;
 +
 +			/* Get info from the header */
 +			len = le16_to_cpu(rx->len);
@@ -78,28 +99,16 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  			skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
  			skb_put(skb, BGMAC_RX_FRAME_OFFSET +
  				BGMAC_RX_BUF_OFFSET + len);
-@@ -458,14 +440,16 @@ static int bgmac_dma_rx_read(struct bgma
- 			skb_checksum_none_assert(skb);
- 			skb->protocol = eth_type_trans(skb, bgmac->net_dev);
- 			napi_gro_receive(&bgmac->napi, skb);
--			handled++;
+@@ -465,6 +460,8 @@ static int bgmac_dma_rx_read(struct bgma
+ 			handled++;
  		} while (0);
  
-+		/* Prepare new skb as replacement */
-+		if (bgmac_dma_rx_skb_for_slot(bgmac, slot))
-+			continue;
-+
 +		bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
 +
  		if (++ring->start >= BGMAC_RX_RING_SLOTS)
  			ring->start = 0;
--
--		if (handled >= weight) /* Should never be greater */
--			break;
- 	}
  
- 	return handled;
-@@ -528,14 +512,14 @@ static void bgmac_dma_rx_ring_free(struc
+@@ -532,14 +529,14 @@ static void bgmac_dma_rx_ring_free(struc
  
  	for (i = 0; i < ring->num_slots; i++) {
  		slot = &ring->slots[i];
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
index 9785621cbc..705aa2d2a4 100644
--- 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
@@ -11,7 +11,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -428,6 +428,13 @@ static int bgmac_dma_rx_read(struct bgma
+@@ -445,6 +445,13 @@ static int bgmac_dma_rx_read(struct bgma
  				break;
  			}
  
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
index 423b204aa0..ed03db069e 100644
--- 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
@@ -11,7 +11,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -545,18 +545,26 @@ static void bgmac_dma_ring_desc_free(str
+@@ -562,18 +562,26 @@ static void bgmac_dma_ring_desc_free(str
  			  ring->dma_base);
  }
  
@@ -44,7 +44,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  }
  
  static int bgmac_dma_alloc(struct bgmac *bgmac)
-@@ -604,8 +612,6 @@ static int bgmac_dma_alloc(struct bgmac 
+@@ -621,8 +629,6 @@ static int bgmac_dma_alloc(struct bgmac 
  	}
  
  	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
@@ -53,7 +53,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		ring = &bgmac->rx_ring[i];
  		ring->num_slots = BGMAC_RX_RING_SLOTS;
  		ring->mmio_base = ring_base[i];
-@@ -628,15 +634,6 @@ static int bgmac_dma_alloc(struct bgmac 
+@@ -645,15 +651,6 @@ static int bgmac_dma_alloc(struct bgmac 
  			ring->index_base = lower_32_bits(ring->dma_base);
  		else
  			ring->index_base = 0;
@@ -69,7 +69,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	}
  
  	return 0;
-@@ -646,10 +643,10 @@ err_dma_free:
+@@ -663,10 +660,10 @@ err_dma_free:
  	return -ENOMEM;
  }
  
@@ -82,7 +82,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  
  	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
  		ring = &bgmac->tx_ring[i];
-@@ -681,8 +678,13 @@ static void bgmac_dma_init(struct bgmac 
+@@ -698,8 +695,13 @@ static void bgmac_dma_init(struct bgmac 
  		if (ring->unaligned)
  			bgmac_dma_rx_enable(bgmac, ring);
  
@@ -90,23 +90,27 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 +		for (j = 0; j < ring->num_slots; j++) {
 +			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
 +			if (err)
-+				return err;
++				goto error;
 +
  			bgmac_dma_rx_setup_desc(bgmac, ring, j);
 +		}
  
  		bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
  			    ring->index_base +
-@@ -691,6 +693,8 @@ static void bgmac_dma_init(struct bgmac 
+@@ -708,6 +710,12 @@ static void bgmac_dma_init(struct bgmac 
  		ring->start = 0;
  		ring->end = 0;
  	}
 +
 +	return 0;
++
++error:
++	bgmac_dma_cleanup(bgmac);
++	return err;
  }
  
  /**************************************************
-@@ -1166,11 +1170,8 @@ static void bgmac_enable(struct bgmac *b
+@@ -1183,11 +1191,8 @@ static void bgmac_enable(struct bgmac *b
  }
  
  /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
@@ -119,7 +123,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	/* 1 interrupt per received frame */
  	bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
  
-@@ -1188,16 +1189,7 @@ static void bgmac_chip_init(struct bgmac
+@@ -1205,16 +1210,7 @@ static void bgmac_chip_init(struct bgmac
  
  	bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN);
  
@@ -137,14 +141,14 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  
  	bgmac_enable(bgmac);
  }
-@@ -1257,8 +1249,13 @@ static int bgmac_open(struct net_device 
+@@ -1274,23 +1270,27 @@ static int bgmac_open(struct net_device 
  	int err = 0;
  
  	bgmac_chip_reset(bgmac);
 +
 +	err = bgmac_dma_init(bgmac);
 +	if (err)
-+		goto err_out;
++		return err;
 +
  	/* Specs say about reclaiming rings here, but we do that in DMA init */
 -	bgmac_chip_init(bgmac, true);
@@ -152,18 +156,25 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  
  	err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED,
  			  KBUILD_MODNAME, net_dev);
-@@ -1271,8 +1268,10 @@ static int bgmac_open(struct net_device 
+ 	if (err < 0) {
+ 		bgmac_err(bgmac, "IRQ request error: %d!\n", err);
+-		goto err_out;
++		bgmac_dma_cleanup(bgmac);
++		return err;
+ 	}
+ 	napi_enable(&bgmac->napi);
+ 
  	phy_start(bgmac->phy_dev);
  
  	netif_carrier_on(net_dev);
+-
+-err_out:
+-	return err;
 +	return 0;
- 
- err_out:
-+	bgmac_dma_cleanup(bgmac);
- 	return err;
  }
  
-@@ -1289,6 +1288,7 @@ static int bgmac_stop(struct net_device 
+ static int bgmac_stop(struct net_device *net_dev)
+@@ -1306,6 +1306,7 @@ static int bgmac_stop(struct net_device 
  	free_irq(bgmac->core->irq, net_dev);
  
  	bgmac_chip_reset(bgmac);
diff --git a/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch b/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch
index 846e2ee0e2..2e670d89b0 100644
--- a/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch
+++ b/target/linux/generic/patches-3.18/077-11-bgmac-fix-DMA-rx-corruption.patch
@@ -17,7 +17,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -362,6 +362,16 @@ static int bgmac_dma_rx_skb_for_slot(str
+@@ -366,6 +366,16 @@ static int bgmac_dma_rx_skb_for_slot(str
  	return 0;
  }
  
@@ -34,7 +34,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac,
  				    struct bgmac_dma_ring *ring, int desc_idx)
  {
-@@ -380,6 +390,8 @@ static void bgmac_dma_rx_setup_desc(stru
+@@ -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);
@@ -42,8 +42,8 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 +	ring->end = desc_idx;
  }
  
- static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
-@@ -394,9 +406,7 @@ static int bgmac_dma_rx_read(struct bgma
+ 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);
  
@@ -54,8 +54,8 @@ 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;
-@@ -459,6 +469,8 @@ static int bgmac_dma_rx_read(struct bgma
- 			ring->start = 0;
+@@ -476,6 +486,8 @@ static int bgmac_dma_rx_read(struct bgma
+ 			break;
  	}
  
 +	bgmac_dma_rx_update_index(bgmac, ring);
@@ -63,7 +63,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	return handled;
  }
  
-@@ -678,6 +690,8 @@ static int bgmac_dma_init(struct bgmac *
+@@ -695,6 +707,8 @@ static int bgmac_dma_init(struct bgmac *
  		if (ring->unaligned)
  			bgmac_dma_rx_enable(bgmac, ring);
  
@@ -72,7 +72,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		for (j = 0; j < ring->num_slots; j++) {
  			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
  			if (err)
-@@ -686,12 +700,7 @@ static int bgmac_dma_init(struct bgmac *
+@@ -703,12 +717,7 @@ static int bgmac_dma_init(struct bgmac *
  			bgmac_dma_rx_setup_desc(bgmac, ring, j);
  		}
  
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
index 36acc19716..90f3e6d1df 100644
--- 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
@@ -19,7 +19,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		ctl0 |= BGMAC_DESC_CTL0_EOT;
  
  	ctl1 = len & BGMAC_DESC_CTL1_LEN;
-@@ -378,7 +378,7 @@ static void bgmac_dma_rx_setup_desc(stru
+@@ -382,7 +382,7 @@ static void bgmac_dma_rx_setup_desc(stru
  	struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
  	u32 ctl0 = 0, ctl1 = 0;
  
@@ -28,7 +28,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		ctl0 |= BGMAC_DESC_CTL0_EOT;
  	ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
  	/* Is there any BGMAC device that requires extension? */
-@@ -504,7 +504,7 @@ static void bgmac_dma_tx_ring_free(struc
+@@ -521,7 +521,7 @@ static void bgmac_dma_tx_ring_free(struc
  	struct bgmac_slot_info *slot;
  	int i;
  
@@ -37,7 +37,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
  
  		slot = &ring->slots[i];
-@@ -529,7 +529,7 @@ static void bgmac_dma_rx_ring_free(struc
+@@ -546,7 +546,7 @@ static void bgmac_dma_rx_ring_free(struc
  	struct bgmac_slot_info *slot;
  	int i;
  
@@ -46,7 +46,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		slot = &ring->slots[i];
  		if (!slot->dma_addr)
  			continue;
-@@ -543,7 +543,8 @@ static void bgmac_dma_rx_ring_free(struc
+@@ -560,7 +560,8 @@ static void bgmac_dma_rx_ring_free(struc
  }
  
  static void bgmac_dma_ring_desc_free(struct bgmac *bgmac,
@@ -56,7 +56,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  {
  	struct device *dma_dev = bgmac->core->dma_dev;
  	int size;
-@@ -552,7 +553,7 @@ static void bgmac_dma_ring_desc_free(str
+@@ -569,7 +570,7 @@ static void bgmac_dma_ring_desc_free(str
  	    return;
  
  	/* Free ring of descriptors */
@@ -65,7 +65,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  	dma_free_coherent(dma_dev, size, ring->cpu_base,
  			  ring->dma_base);
  }
-@@ -573,10 +574,12 @@ static void bgmac_dma_free(struct bgmac 
+@@ -590,10 +591,12 @@ static void bgmac_dma_free(struct bgmac 
  	int i;
  
  	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
@@ -80,7 +80,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  }
  
  static int bgmac_dma_alloc(struct bgmac *bgmac)
-@@ -599,11 +602,10 @@ static int bgmac_dma_alloc(struct bgmac 
+@@ -616,11 +619,10 @@ static int bgmac_dma_alloc(struct bgmac 
  
  	for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
  		ring = &bgmac->tx_ring[i];
@@ -93,7 +93,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
  						     &ring->dma_base,
  						     GFP_KERNEL);
-@@ -625,11 +627,10 @@ static int bgmac_dma_alloc(struct bgmac 
+@@ -642,11 +644,10 @@ static int bgmac_dma_alloc(struct bgmac 
  
  	for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
  		ring = &bgmac->rx_ring[i];
@@ -106,7 +106,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  		ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
  						     &ring->dma_base,
  						     GFP_KERNEL);
-@@ -692,7 +693,7 @@ static int bgmac_dma_init(struct bgmac *
+@@ -709,7 +710,7 @@ static int bgmac_dma_init(struct bgmac *
  
  		ring->start = 0;
  		ring->end = 0;
@@ -114,7 +114,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 +		for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) {
  			err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
  			if (err)
- 				return err;
+ 				goto error;
 --- a/drivers/net/ethernet/broadcom/bgmac.h
 +++ b/drivers/net/ethernet/broadcom/bgmac.h
 @@ -419,11 +419,10 @@ struct bgmac_dma_ring {
diff --git a/target/linux/generic/patches-3.18/077-14-bgmac-reset-all-4-GMAC-cores-on-init.patch b/target/linux/generic/patches-3.18/077-14-bgmac-reset-all-4-GMAC-cores-on-init.patch
index c23496bd43..2a913a60e7 100644
--- a/target/linux/generic/patches-3.18/077-14-bgmac-reset-all-4-GMAC-cores-on-init.patch
+++ b/target/linux/generic/patches-3.18/077-14-bgmac-reset-all-4-GMAC-cores-on-init.patch
@@ -12,7 +12,7 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 
 --- a/drivers/net/ethernet/broadcom/bgmac.c
 +++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -1605,8 +1605,11 @@ static int bgmac_probe(struct bcma_devic
+@@ -1623,8 +1623,11 @@ static int bgmac_probe(struct bcma_devic
  			ns_core = bcma_find_core_unit(core->bus,
  						      BCMA_CORE_MAC_GBIT,
  						      ns_gmac);
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 d6f1f3301c..3b2751f529 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[] = {
-@@ -1520,6 +1521,17 @@ static void bgmac_mii_unregister(struct 
+@@ -1538,6 +1539,17 @@ 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
   **************************************************/
-@@ -1646,6 +1658,16 @@ static int bgmac_probe(struct bcma_devic
+@@ -1664,6 +1676,16 @@ 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");
-@@ -1672,6 +1694,10 @@ static void bgmac_remove(struct bcma_dev
+@@ -1690,6 +1712,10 @@ static void bgmac_remove(struct bcma_dev
  {
  	struct bgmac *bgmac = bcma_get_drvdata(core);