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authorHerbert Xu <herbert@gondor.apana.org.au>2011-11-18 03:20:04 +0100
committerDavid S. Miller <davem@davemloft.net>2011-11-18 20:37:09 +0100
commitae641949df01b85117845bec45328eab6d6fada1 (patch)
treeed8d5aedd678f86e8554dc0b1c080a43ef4b331d /net/econet
parentipv6: Remove all uses of LL_ALLOCATED_SPACE (diff)
downloadlinux-ae641949df01b85117845bec45328eab6d6fada1.tar.xz
linux-ae641949df01b85117845bec45328eab6d6fada1.zip
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/econet')
-rw-r--r--net/econet/af_econet.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 1c1f26c5d672..7e717cb35ad1 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -322,6 +322,7 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
/* Real hardware Econet. We're not worthy etc. */
#ifdef CONFIG_ECONET_NATIVE
unsigned short proto = 0;
+ int hlen, tlen;
int res;
if (len + 15 > dev->mtu) {
@@ -331,12 +332,14 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
dev_hold(dev);
- skb = sock_alloc_send_skb(sk, len + LL_ALLOCATED_SPACE(dev),
+ hlen = LL_RESERVED_SPACE(dev);
+ tlen = dev->needed_tailroom;
+ skb = sock_alloc_send_skb(sk, len + hlen + tlen,
msg->msg_flags & MSG_DONTWAIT, &err);
if (skb == NULL)
goto out_unlock;
- skb_reserve(skb, LL_RESERVED_SPACE(dev));
+ skb_reserve(skb, hlen);
skb_reset_network_header(skb);
eb = (struct ec_cb *)&skb->cb;