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

[Sam Mei]

Could you detail the steps so I can make a test on my 7620n board?

I have build a wrtnode version for my 7620n router, and looks like everything runs well. 

sam

> 在 2014年9月25日，13:04，Yousong Zhou <yszhou4tech at gmail.com> 写道：
> 
>> 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
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