[PATCH] net: atheros: atl1: use offset_in_page() macro

[Geliang Tang]

Use offset_in_page() macro instead of open-coding.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
---
 drivers/net/ethernet/atheros/atlx/atl1.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/atheros/atlx/atl1.c 
b/drivers/net/ethernet/atheros/atlx/atl1.c
index 022772e..83d2db2 100644
--- a/drivers/net/ethernet/atheros/atlx/atl1.c
+++ b/drivers/net/ethernet/atheros/atlx/atl1.c
@@ -1886,7 +1886,7 @@ static u16 atl1_alloc_rx_buffers(struct atl1_adapter 
*adapter)
                buffer_info->skb = skb;
                buffer_info->length = (u16) adapter->rx_buffer_len;
                page = virt_to_page(skb->data);
-               offset = (unsigned long)skb->data & ~PAGE_MASK;
+               offset = offset_in_page(skb->data);
                buffer_info->dma = pci_map_page(pdev, page, offset,
                                                adapter->rx_buffer_len,
                                                PCI_DMA_FROMDEVICE);
@@ -2230,7 +2230,7 @@ static void atl1_tx_map(struct atl1_adapter *adapter, 
struct sk_buff *skb,
                hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
                buffer_info->length = hdr_len;
                page = virt_to_page(skb->data);
-               offset = (unsigned long)skb->data & ~PAGE_MASK;
+               offset = offset_in_page(skb->data);
                buffer_info->dma = pci_map_page(adapter->pdev, page,
                                                offset, hdr_len,
                                                PCI_DMA_TODEVICE);
@@ -2254,9 +2254,8 @@ static void atl1_tx_map(struct atl1_adapter *adapter, 
struct sk_buff *skb,
                                data_len -= buffer_info->length;
                                page = virt_to_page(skb->data +
                                        (hdr_len + i * ATL1_MAX_TX_BUF_LEN));
-                               offset = (unsigned long)(skb->data +
-                                       (hdr_len + i * ATL1_MAX_TX_BUF_LEN)) &
-                                       ~PAGE_MASK;
+                               offset = offset_in_page(skb->data +
+                                       (hdr_len + i * ATL1_MAX_TX_BUF_LEN));
                                buffer_info->dma = pci_map_page(adapter->pdev,
                                        page, offset, buffer_info->length,
                                        PCI_DMA_TODEVICE);
@@ -2268,7 +2267,7 @@ static void atl1_tx_map(struct atl1_adapter *adapter, 
struct sk_buff *skb,
                /* not TSO */
                buffer_info->length = buf_len;
                page = virt_to_page(skb->data);
-               offset = (unsigned long)skb->data & ~PAGE_MASK;
+               offset = offset_in_page(skb->data);
                buffer_info->dma = pci_map_page(adapter->pdev, page,
                        offset, buf_len, PCI_DMA_TODEVICE);
                if (++next_to_use == tpd_ring->count)
-- 
2.9.3