commit 9e903e085262ffbf1fc44a17ac06058aca03524a
author Eric Dumazet <eric.dumazet@gmail.com> Tue Oct 18 21:00:24 2011 +0000
committer David S. Miller <davem@davemloft.net> Wed Oct 19 03:10:46 2011 -0400
tree 4acefc97ba38c1733474d25c0b2053b56af97db1
parent dd767856a36e00b631d65ebc4bb81b19915532d6

net: add skb frag size accessors

To ease skb->truesize sanitization, its better to be able to localize
all references to skb frags size.

Define accessors : skb_frag_size() to fetch frag size, and
skb_frag_size_{set|add|sub}() to manipulate it.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aeroflex/greth.c

diff --git a/drivers/net/ethernet/aeroflex/greth.c b/drivers/net/ethernet/aeroflex/greth.c
index 6715bf5..442fefa 100644
--- a/drivers/net/ethernet/aeroflex/greth.c
+++ b/drivers/net/ethernet/aeroflex/greth.c
@@ -198,7 +198,7 @@
 
 				dma_unmap_page(greth->dev,
 					       greth_read_bd(&tx_bdp->addr),
-					       frag->size,
+					       skb_frag_size(frag),
 					       DMA_TO_DEVICE);
 
 				greth->tx_last = NEXT_TX(greth->tx_last);
@@ -517,7 +517,7 @@
 		status = GRETH_BD_EN;
 		if (skb->ip_summed == CHECKSUM_PARTIAL)
 			status |= GRETH_TXBD_CSALL;
-		status |= frag->size & GRETH_BD_LEN;
+		status |= skb_frag_size(frag) & GRETH_BD_LEN;
 
 		/* Wrap around descriptor ring */
 		if (curr_tx == GRETH_TXBD_NUM_MASK)
@@ -531,7 +531,7 @@
 
 		greth_write_bd(&bdp->stat, status);
 
-		dma_addr = skb_frag_dma_map(greth->dev, frag, 0, frag->size,
+		dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag),
 					    DMA_TO_DEVICE);
 
 		if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
@@ -713,7 +713,7 @@
 
 			dma_unmap_page(greth->dev,
 				       greth_read_bd(&bdp->addr),
-				       frag->size,
+				       skb_frag_size(frag),
 				       DMA_TO_DEVICE);
 
 			greth->tx_last = NEXT_TX(greth->tx_last);