net: dont use __netdev_alloc_skb for bounce buffer

commit a1c7fff7e1 (net: netdev_alloc_skb() use build_skb()) broke b44 on
some 64bit machines.

It appears b44 and b43 use __netdev_alloc_skb() instead of alloc_skb()
for their bounce buffers.

There is no need to add an extra NET_SKB_PAD reservation for bounce
buffers :

- In TX path, NET_SKB_PAD is useless

- In RX path in b44, we force a copy of incoming frames if
  GFP_DMA allocations were needed.

Reported-and-bisected-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c
index 46b8b7d81633..d09c6b583d17 100644
--- a/drivers/net/ethernet/broadcom/b44.c
+++ b/drivers/net/ethernet/broadcom/b44.c
@@ -656,7 +656,7 @@ static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
                         dma_unmap_single(bp->sdev->dma_dev, mapping,
                                              RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
                 dev_kfree_skb_any(skb);
-                skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
+                skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA);
                 if (skb == NULL)
                         return -ENOMEM;
                 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
@@ -967,7 +967,7 @@ static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
                         dma_unmap_single(bp->sdev->dma_dev, mapping, len,
                                              DMA_TO_DEVICE);
 
-                bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
+                bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA);
                 if (!bounce_skb)
                         goto err_out;