diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-11-18 02:20:04 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-18 14:37:09 -0500 |
| commit | ae641949df01b85117845bec45328eab6d6fada1 (patch) | |
| tree | ed8d5aedd678f86e8554dc0b1c080a43ef4b331d /net/econet/af_econet.c | |
| parent | a7ae1992248e5cf9dc5bd35695ab846d27efe15f (diff) | |
| download | lwn-ae641949df01b85117845bec45328eab6d6fada1.tar.gz lwn-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/af_econet.c')
| -rw-r--r-- | net/econet/af_econet.c | 7 |
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; |