[OpenWrt-Devel] [PATCH] axs10x: initilaze network for wireless access-point

[Jonas Gorski]

On Mon, Nov 23, 2015 at 9:28 AM, Alexey Brodkin
<Alexey.Brodkin at synopsys.com> wrote:
> ARC SDP board sports only 1 network interface - eth0,
> so to operate as an access point it requires at least
> another interface (preferably wireless),
> so USB Wi-Fi dongle is what we want.
>
> And with USB Wi-Fi dongle attached ARC SDP board could be
> used as a "dumb" wireless access point.
>
> Now with modified network setup script it is only required
> to enable wireless radio on the first boot with
> -------------->8------------
> uci set wireless.radio0.disabled=0
> uci commit wireless
> wifi
> -------------->8------------
>
> Note if by the time initscripts are executed USB Wi-Fi
> dongle not yet recognized and set up by Linux kernel
> its autodetection by "wifi" tool may not happen
> automatically. In that case before issuing command above
> one needs to populate /etc/config/wireless config:
> -------------->8------------
> wifi detect > /etc/config/wireless
> -------------->8------------
>
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Cc: Felix Fietkau <nbd at openwrt.org>
> Cc: Jo-Philipp Wich <jow at openwrt.org>
> Cc: Jonas Gorski <jogo at openwrt.org>
> ---
>  target/linux/arc770/base-files/etc/uci-defaults/02_network | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/target/linux/arc770/base-files/etc/uci-defaults/02_network b/target/linux/arc770/base-files/etc/uci-defaults/02_network
> index 87cfe81..7503f85 100644
> --- a/target/linux/arc770/base-files/etc/uci-defaults/02_network
> +++ b/target/linux/arc770/base-files/etc/uci-defaults/02_network
> @@ -14,7 +14,17 @@ ucidef_set_interface_loopback
>
>  case "$( arc_board_name )" in
>  "arc-sdp"*)
> -       ucidef_set_interface_raw "lan" "eth0" "dhcp"

Keep this line instead

> +       uci set network.lan.type='bridge'

And only add this line.

> +       uci set network.lan.ifname='eth0 wlan0'

This is unneeded, as netifd will automatically join the wifi interface
to the bridge in the default config (with the option network 'lan'
line in /etc/config/wireless).

> +       # With multicast-to-unicast enabled kernel crashes
> +       # on the first wireless client connection in
> +       # br_multicast_add_group() -> br_port_group_equal() ->
> +       # ether_addr_equal() due to misaligned read.
> +       # For some reason "src" being "eth_hdr(skb)->h_source"
> +       # is not 16-bit aligned as it is supposed to be.
> +       uci set network.lan.multicast_to_unicast='0'

And this doesn't belong here at all, this is a complete separate issue
and should be fixed where it occurs, not worked around (sounds like an
issue in the ath9k-htc driver). Does ARC not provide emulation of
unaligned accesses like mips does?


Jonas
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