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authorGabor Gombas <gombasg@sztaki.hu>2009-10-29 06:19:11 -0400
committerDavid S. Miller <davem@davemloft.net>2009-10-29 06:19:11 -0400
commitb5dd884e682cae6b8c037f9d11f3b623b4cf2011 (patch)
tree224328f65e56b5d4b33078f09b397ec9e4b6ff46 /net/packet
parent06b71b657b03c33b8d919da29f33d326f1471b39 (diff)
net: Fix 'Re: PACKET_TX_RING: packet size is too long'
Currently PACKET_TX_RING forces certain amount of every frame to remain unused. This probably originates from an early version of the PACKET_TX_RING patch that in fact used the extra space when the (since removed) CONFIG_PACKET_MMAP_ZERO_COPY option was enabled. The current code does not make any use of this extra space. This patch removes the extra space reservation and lets userspace make use of the full frame size. Signed-off-by: Gabor Gombas <gombasg@sztaki.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
-rw-r--r--net/packet/af_packet.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 1238949e66a9..48b18dad6763 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -982,10 +982,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
982 goto out_put; 982 goto out_put;
983 983
984 size_max = po->tx_ring.frame_size 984 size_max = po->tx_ring.frame_size
985 - sizeof(struct skb_shared_info) 985 - (po->tp_hdrlen - sizeof(struct sockaddr_ll));
986 - po->tp_hdrlen
987 - LL_ALLOCATED_SPACE(dev)
988 - sizeof(struct sockaddr_ll);
989 986
990 if (size_max > dev->mtu + reserve) 987 if (size_max > dev->mtu + reserve)
991 size_max = dev->mtu + reserve; 988 size_max = dev->mtu + reserve;