[OpenWrt-Devel] wireless scan/add functioning wrong on my MTK7620n board

[Yousong Zhou]

On 25 September 2014 12:06, 张钊 <formywillcancer at gmail.com> wrote:
> I’ve built a firmware from git.openwrt.org/openwrt.git known as  CHAOS
> CALMER (Bleeding Edge, r42657) for my MTK7620n board, it works well except
> this weird problem.
>
> When I enable wifi, then trying to use iw dev wlan0 scan or trying to add
> secondary AP from luci interface, my board will reboot without any signs at
> all, when it rebooted, secondary AP was added, can be joined normally but I
> also found a call trace about rt2800lib.c during the initialisation process,
> I wonder is this happened on your boards? I only have limited hardware
> driver debug skill and if I want to fix it by myself, where to go first?
>

I haven't seen this before.  Maybe it's caused by kernel panic and
reboot?  You may want to attach a serial console to it and see the
output.

> [   32.090000] ------------[ cut here ]------------
> [   32.100000] WARNING: CPU: 0 PID: 1050 at
> /home/zhangzhao/owrt/openwrt/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7620n/compat-wireless-2014-05-22/drivers/net/wireless/rt2x00/rt2800lib.c:1092
> rt2800_conf_tx+0x3c8/0x494 [rt2800lib]()
> [   32.150000] Modules linked in: rt2800soc rt2800mmio rt2800lib pppoe
> ppp_async iptable_nat rt2x00soc rt2x00mmio rt2x00lib pppox ppp_generic
> nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE
> cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac
> xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT
> slhc nf_nat_irc nf_nat_ftp nf_nat nf_defrag_ipv6 nf_defrag_ipv4
> nf_conntrack_irc nf_conntrack_ftp nf_conntrack iptable_raw iptable_mangle
> iptable_filter ipt_REJECT ip_tables crc_itu_t crc_ccitt compat
> ledtrig_usbdev ip6t_REJECT ip6table_raw ip6table_mangle ip6table_filter
> ip6_tables x_tables ipv6 eeprom_93cx6 arc4 crypto_blkcipher leds_gpio
> ohci_platform ohci_hcd ehci_platform ehci_hcd gpio_button_hotplug usbcore
> nls_base usb_common
> [   32.280000] CPU: 0 PID: 1050 Comm: mac80211.sh Not tainted 3.14.16 #1
> [   32.300000] Stack : 00000000 00000000 00000000 00000000 8031ad2e 00000039
> 83294b88 831c0540
>           8027b6d4 802be937 0000041a 8031399c 83294b88 831c0540 00000008
> 0000001c
>           00000001 80225228 00000003 80190aac 00000444 831c0540 8027e850
> 828999bc
>           00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
>           00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 82899948
>           ...
> [   32.310000] Call Trace:
> [   32.310000] [<801ccb78>] show_stack+0x48/0x70
> [   32.310000] [<80236550>] warn_slowpath_common+0x84/0xb4
> [   32.310000] [<80236608>] warn_slowpath_null+0x18/0x24
> [   32.310000] [<83164030>] rt2800_conf_tx+0x3c8/0x494 [rt2800lib]
> [   32.310000]
> [   32.310000] ---[ end trace 0ecb626de4f0471a ]---


This has been reported [1] before and I created a patch for this [2].
Wireless works fine even with this warning triggered.

[1] https://dev.openwrt.org/ticket/17032
[2] http://patchwork.openwrt.org/patch/6182/

Regards.

               yousong
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel