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authorHerbert Xu <herbert@gondor.apana.org.au>2011-11-18 06:20:04 +0400
committerDavid S. Miller <davem@davemloft.net>2011-11-18 23:37:09 +0400
commitae641949df01b85117845bec45328eab6d6fada1 (patch)
treeed8d5aedd678f86e8554dc0b1c080a43ef4b331d /net/core/netpoll.c
parenta7ae1992248e5cf9dc5bd35695ab846d27efe15f (diff)
downloadlinux-ae641949df01b85117845bec45328eab6d6fada1.tar.xz
net: Remove all uses of LL_ALLOCATED_SPACE
net: Remove all uses of LL_ALLOCATED_SPACE The macro LL_ALLOCATED_SPACE was ill-conceived. It applies the alignment to the sum of needed_headroom and needed_tailroom. As the amount that is then reserved for head room is needed_headroom with alignment, this means that the tail room left may be too small. This patch replaces all uses of LL_ALLOCATED_SPACE with the macro LL_RESERVED_SPACE and direct reference to needed_tailroom. This also fixes the problem with needed_headroom changing between allocating the skb and reserving the head room. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/netpoll.c')
-rw-r--r--net/core/netpoll.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index cf64c1ffa4cd..1a7d8e2c9768 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -422,6 +422,7 @@ static void arp_reply(struct sk_buff *skb)
struct sk_buff *send_skb;
struct netpoll *np, *tmp;
unsigned long flags;
+ int hlen, tlen;
int hits = 0;
if (list_empty(&npinfo->rx_np))
@@ -479,8 +480,9 @@ static void arp_reply(struct sk_buff *skb)
if (tip != np->local_ip)
continue;
- send_skb = find_skb(np, size + LL_ALLOCATED_SPACE(np->dev),
- LL_RESERVED_SPACE(np->dev));
+ hlen = LL_RESERVED_SPACE(np->dev);
+ tlen = np->dev->needed_tailroom;
+ send_skb = find_skb(np, size + hlen + tlen, hlen);
if (!send_skb)
continue;