These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / atm / solos-pci.c

diff --git a/kernel/drivers/atm/solos-pci.c b/kernel/drivers/atm/solos-pci.c
index 74e18b0..3d7fb65 100644 (file)
--- a/kernel/drivers/atm/solos-pci.c
+++ b/kernel/drivers/atm/solos-pci.c
@@ -805,7 +805,12 @@ static void solos_bh(unsigned long card_arg)
                                        continue;
                                }
 
-                               skb = alloc_skb(size + 1, GFP_ATOMIC);
+                               /* Use netdev_alloc_skb() because it adds NET_SKB_PAD of
+                                * headroom, and ensures we can route packets back out an
+                                * Ethernet interface (for example) without having to
+                                * reallocate. Adding NET_IP_ALIGN also ensures that both
+                                * PPPoATM and PPPoEoBR2684 packets end up aligned. */
+                               skb = netdev_alloc_skb_ip_align(NULL, size + 1);
                                if (!skb) {
                                        if (net_ratelimit())
                                                dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
@@ -869,7 +874,10 @@ static void solos_bh(unsigned long card_arg)
                /* Allocate RX skbs for any ports which need them */
                if (card->using_dma && card->atmdev[port] &&
                    !card->rx_skb[port]) {
-                       struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
+                       /* Unlike the MMIO case (qv) we can't add NET_IP_ALIGN
+                        * here; the FPGA can only DMA to addresses which are
+                        * aligned to 4 bytes. */
+                       struct sk_buff *skb = dev_alloc_skb(RX_DMA_SIZE);
                        if (skb) {
                                SKB_CB(skb)->dma_addr =
                                        dma_map_single(&card->dev->dev, skb->data,