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Gabor Juhos 30ebad2dee ar71xx: ag71xx: increase calculated max frame length value
The r39147 commit introduces a regression: at lease on some routers
with ar8216 switch large packets get lost if 802.1q tagged port is
used on the interface connected to the aforementioned switch.

The r39147 changes code in the way so interface is set to accept
packets no longer than max ethernet frame length for a given mtu.

Unfortunately ar8216 has a feature: it sends two additional bytes
as a packet header and those this header needs to be added to the
max frame length. Otherwise long enough packets get lost.

The problem only manuifests itself if interface is used in vlan
tagged mode. If interface is untagged then ar8216's header fits
into space used by 802.1q tag and not packets are lost.

Include two additional bytes in the max frame length calculation
to fix the issue.

This patch is tested and works with Trendnet TEW-632BRP.

Signed-off-by Nikolay Martynov <mar.kolya@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/4656/
[juhosg:
  - simplify the patch to include the additional bytes of the
    switch header unconditionally,
  - change subject and update commit message]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39219
2014-01-11 11:15:30 +00:00
config add x86_64 target support 2014-01-07 12:23:35 +00:00
docs docs: update remaining references to functions.sh 2012-12-20 15:29:33 +00:00
include add x86_64 target support 2014-01-07 12:23:35 +00:00
package ath9k: add workaround for AR9331 USB host controller hang with USB1.1 devices 2014-01-10 09:05:31 +00:00
scripts scripts/download.pl: prefer the GNU mirror redirect over the primary site (#14603) 2013-12-13 16:43:07 +00:00
target ar71xx: ag71xx: increase calculated max frame length value 2014-01-11 11:15:30 +00:00
toolchain upgrade the Linaro binutils to 2.24-2013.12 2014-01-07 15:03:55 +00:00
tools firmware-utils: check_magic() in buffalo-lib.c always return 0 2013-12-27 21:15:31 +00:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore .gitignore: Ignore Emacs editor generated files 2011-10-31 09:37:59 +00:00
BSDmakefile add missing copyright header 2007-02-26 01:05:09 +00:00
Config.in move menuconfig options into separate files 2013-11-22 14:30:40 +00:00
feeds.conf.default feeds.conf.default: switch packages feed to git (#13818) 2013-07-05 02:04:40 +00:00
LICENSE finally move buildroot-ng to trunk 2016-03-20 17:29:15 +01:00
Makefile build: it is no longer necessary to call make target/linux/clean as part of make clean 2012-12-02 15:26:28 +00:00
README build: BSD compile fixes 2013-03-07 17:32:29 +00:00
rules.mk FPU type should not interfere with the ABI selection. Also make sure we either do real soft-float or hard-float on ARM, with the right options. 2013-11-29 10:59:51 +00:00

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