diff options
Diffstat (limited to 'target/linux/generic/patches-3.1/051-linux_atm-chas.patch')
| -rw-r--r-- | target/linux/generic/patches-3.1/051-linux_atm-chas.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.1/051-linux_atm-chas.patch b/target/linux/generic/patches-3.1/051-linux_atm-chas.patch new file mode 100644 index 000000000..08bb77df6 --- /dev/null +++ b/target/linux/generic/patches-3.1/051-linux_atm-chas.patch @@ -0,0 +1,83 @@ + + +From: Pascal Hambourg <pascal@plouf.fr.eu.org> +Date: Wed, 17 Aug 2011 08:37:18 +0200 +Subject: [PATCH 1/2] atm: br2684: Make headroom and hard_header_len depend on the payload type + +Routed payload requires less headroom than bridged payload. +So do not reallocate headroom if not needed. +Also, add worst case AAL5 overhead to netdev->hard_header_len. + +Signed-off-by: Pascal Hambourg <pascal@plouf.fr.eu.org> +Signed-off-by: chas williams - CONTRACTOR <chas@cmf.nrl.navy.mil> +--- + net/atm/br2684.c | 8 ++++++-- + 1 files changed, 6 insertions(+), 2 deletions(-) + +diff --git a/net/atm/br2684.c b/net/atm/br2684.c +index 53b0aa1..ed72263 100644 +--- a/net/atm/br2684.c ++++ b/net/atm/br2684.c +@@ -202,7 +202,10 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev, + { + struct br2684_dev *brdev = BRPRIV(dev); + struct atm_vcc *atmvcc; +- int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; ++ int minheadroom = (brvcc->encaps == e_llc) ? ++ ((brdev->payload == p_bridged) ? ++ sizeof(llc_oui_pid_pad) : sizeof(llc_oui_ipv4)) : ++ ((brdev->payload == p_bridged) ? BR2684_PAD_LEN : 0); + + if (skb_headroom(skb) < minheadroom) { + struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); +@@ -583,6 +586,7 @@ static void br2684_setup(struct net_device *netdev) + struct br2684_dev *brdev = BRPRIV(netdev); + + ether_setup(netdev); ++ netdev->hard_header_len += sizeof(llc_oui_pid_pad); /* worst case */ + brdev->net_dev = netdev; + + netdev->netdev_ops = &br2684_netdev_ops; +@@ -595,7 +599,7 @@ static void br2684_setup_routed(struct net_device *netdev) + struct br2684_dev *brdev = BRPRIV(netdev); + + brdev->net_dev = netdev; +- netdev->hard_header_len = 0; ++ netdev->hard_header_len = sizeof(llc_oui_ipv4); /* worst case */ + netdev->netdev_ops = &br2684_netdev_ops_routed; + netdev->addr_len = 0; + netdev->mtu = 1500; + +From: Pascal Hambourg <pascal@plouf.fr.eu.org> +Date: Wed, 17 Aug 2011 08:37:52 +0200 +Subject: [PATCH 2/2] atm: br2684: Avoid alignment issues + +Use memcmp() instead of cast to u16 when checking the PAD field. + +Signed-off-by: Pascal Hambourg <pascal@plouf.fr.eu.org> +Signed-off-by: chas williams - CONTRACTOR <chas@cmf.nrl.navy.mil> +--- + net/atm/br2684.c | 3 ++- + 1 files changed, 2 insertions(+), 1 deletions(-) + +diff --git a/net/atm/br2684.c b/net/atm/br2684.c +index ed72263..353fccf 100644 +--- a/net/atm/br2684.c ++++ b/net/atm/br2684.c +@@ -53,6 +53,7 @@ static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 }; + static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 }; + static const unsigned char llc_oui_pid_pad[] = + { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED }; ++static const unsigned char pad[] = { PAD_BRIDGED }; + static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 }; + static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 }; + +@@ -453,7 +454,7 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) + skb->pkt_type = PACKET_HOST; + } else { /* p_bridged */ + /* first 2 chars should be 0 */ +- if (*((u16 *) (skb->data)) != 0) ++ if (memcmp(skb->data, pad, BR2684_PAD_LEN) != 0) + goto error; + skb_pull(skb, BR2684_PAD_LEN); + skb->protocol = eth_type_trans(skb, net_dev); |