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authorJohn Crispin <john@openwrt.org>2014-04-22 08:07:53 +0000
committerJohn Crispin <john@openwrt.org>2014-04-22 08:07:53 +0000
commitcdc53e2ec90b017e5a21e3a8b36536c523367de9 (patch)
tree220b82e3ce8b17eb8fb34d7ddaa55e52e5c748f5
parent248678fccd8b3db8858a796fd8d3cb75da07cc28 (diff)
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lantiq: fix maximum ethernet header length
The total ethernet frame length should be written to the hardware register LTQ_ETOP_IGPLEN instead of just the value of the MTU. This patch fixes network issues on various Danube boards, especially when VLAN tagging is enabled. Signed-off-by: Matti Laakso <malaakso at elisanet.fi> SVN-Revision: 40541
-rw-r--r--target/linux/lantiq/patches-3.10/0207-NET-fix-etop-igplen.patch22
1 files changed, 22 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.10/0207-NET-fix-etop-igplen.patch b/target/linux/lantiq/patches-3.10/0207-NET-fix-etop-igplen.patch
new file mode 100644
index 0000000000..59bdcbf33b
--- /dev/null
+++ b/target/linux/lantiq/patches-3.10/0207-NET-fix-etop-igplen.patch
@@ -0,0 +1,22 @@
+--- a/drivers/net/ethernet/lantiq_etop.c
++++ b/drivers/net/ethernet/lantiq_etop.c
+@@ -31,6 +31,7 @@
+ #include <linux/mm.h>
+ #include <linux/platform_device.h>
+ #include <linux/ethtool.h>
++#include <linux/if_vlan.h>
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/io.h>
+@@ -764,8 +765,10 @@ ltq_etop_change_mtu(struct net_device *d
+ struct ltq_etop_priv *priv = netdev_priv(dev);
+ unsigned long flags;
+
++ int max = ETH_HLEN + VLAN_HLEN + new_mtu + ETH_FCS_LEN;
++
+ spin_lock_irqsave(&priv->lock, flags);
+- ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu,
++ ltq_etop_w32((ETOP_PLEN_UNDER << 16) | max,
+ LTQ_ETOP_IGPLEN);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }