System dead when turn off WIFI

Hi all,

       I was the person who found this BUG. 

       Sometimes kernel just only print “wlanDrvIf_Release”and die ,  and sometimes it would print as follow :

[ 2088.815296] wlanDrvIf_Release
[ 2089.846538] BUG: spinlock bad magic on CPU#0, /1073951288
[ 2089.850467]  lock: 40083258, .magic: 00000023, .owner: <none>/-1, .owner_cpu: 1073801336
[ 2089.858552] [<c003b58c>] (unwind_backtrace+0x0/0xf8) from [<c04e3d78>] (dump_stack+0x20/0x24)
[ 2089.867025] [<c04e3d78>] (dump_stack+0x20/0x24) from [<c022cb0c>] (spin_bug+0x90/0xa4)
[ 2089.874908] [<c022cb0c>] (spin_bug+0x90/0xa4) from [<c022cc54>] (do_raw_spin_lock+0x2c/0x168)
[ 2089.883402] [<c022cc54>] (do_raw_spin_lock+0x2c/0x168) from [<c04e7268>] (_raw_spin_lock_irqsave+0x38/0x40)
[ 2089.893110] [<c04e7268>] (_raw_spin_lock_irqsave+0x38/0x40) from [<c0226430>] (__down_read_trylock+0x1c/0x5c)
[ 2089.902989] [<c0226430>] (__down_read_trylock+0x1c/0x5c) from [<c008a248>] (down_read_trylock+0x18/0x1c)
[ 2089.912430] [<c008a248>] (down_read_trylock+0x18/0x1c) from [<c003c5bc>] (do_page_fault+0x74/0x204)
[ 2089.921440] [<c003c5bc>] (do_page_fault+0x74/0x204) from [<c003c814>] (do_translation_fault+0x2c/0xa8)
[ 2089.930713] [<c003c814>] (do_translation_fault+0x2c/0xa8) from [<c0034314>] (do_DataAbort+0x44/0xa8)
[ 2089.939812] [<c0034314>] (do_DataAbort+0x44/0xa8) from [<c0034aec>] (__dabt_svc+0x4c/0x60)

Where does the BUG come from?

Thanks / Jason

Hi

I don’t have the Android source code however as far as driver concerns it is similar to the Linux release, and I am referring to the legacy driver since I think that that is the code base you are working with (if not then please let me know which release you are using)

wlanDrvIf_Release() is part of the network stack interface as defined in

static struct net_device_ops wlanDrvIf_Ops =

{

    .ndo_open = wlanDrvIf_Open,

    .ndo_stop = wlanDrvIf_Release,

    .ndo_start_xmit = wlanDrvIf_XmitDummy,

    .ndo_get_stats = wlanDrvIf_NetGetStat,

};

 int wlanDrvIf_Release (struct net_device *dev)

{

    WLAN_OS_REPORT(("wlanDrvIf_Release()\n"));

    /* Disable network interface queue */

    netif_stop_queue (dev);

    return 0;

}

 wlanDrvIf_Stop() can be called by the Driver when the driver is entering suspend mode or when the system decide to release the driver.

As for the crush you get from wlanDrvIf_Release() it looks like it is in the network stack since it is probably from  netif_stop_queue()

Regards,

Eyal

Hi Eyal,

        Thanks very much for your kind help !   

We use the 'wl1271' chip, and the driver version is :

TIWLAN: 399.922449: Driver Version  : WiLink_Driver_6.1.0.0.144
TIWLAN: 399.928214: Firmware Version: Rev 6.1.0.0.335
TIWLAN: 399.933155: Station ID      : 08-00-28-22-56-46

Is there the newer code base driver of WL1271 ? 

By the way, our custom want  WL1271 to support two new functions of Sotf-AP and WIFI P2P  for Android4.0.   Is there a driver version to support them ? If not, any suggestion to enable these functions ?

Thanks again for your help!

Jason

Hi Jason,

The WLAN driver that you are using is based on our Legacy driver which does not supports new features such as Access Point and WiFi direct.

In order to support that we have a newer Driver architecture that is based on Open Source driver, we have it as part as our platforms offering (AM18x, AM37x and AM335x Platforms) however the support is on Linux.

For Android based releases,  will forward that request to our Marketing and they will respond in that thread soon.

Regards,

Eyal

Hi Eyal,

       (1)  How can I get the driver code of WL1271 that is based on Open Source driver,  being refered to by you above ? Although the support is on Linux, I should try to move it on Android.  So are there some documents for this ? If possible, send them to my e-mail:jiansheng.liu@sim.com

      (2)  The  name of the WLAN driver that we are using is 'L25.INC3.3' when we get it from TI.  Do you have a newer driver version basing on  Legacy driver ? Please give me if yes.

      (3) We can't solve it althought  finding the reason of the bug "System dead when turn off WIFI".  When turn off wifi, system dies because it executes "rmmod".  After turn on wifi,  more exactly is after "ifconfig tiwlan0 up", it will die when executing "lsmod" or "rmmod" or "cat /proc/module".  Before "ifconfig tiwlan0 up", it is OK when executing everything, even executing "insmod tiwlan_drv.ko" and "./tiwlan_loader".  What is wrong? and How to solve it?

Thanks very much!

Jason

Jason,

The WL1271 Driver integrated into our upcoming Android 4.0 Release for AM335x and AM37x Platform does support Soft AP and WiFi Direct features.

However, twe don't have plans for integrating or testing these features at the ANdroid Framework level.

Adnan

Hi Eyal,

      I am sorry to trouble you again !   How can I get the wl12xx wlan driver base on NLCP for Android2.3 or Android2.2 ?   Are there some  UserGuide for NLCP architecture that is based on Open Source driver ?  

     I really hope that you have the WIFI driver supporting Soft-AP for Android2.2 or Android2.3.

     Thanks very much!

    Jason

Hi Jason,

Please search in http://omappedia.org/wiki/Main_Page

Regards,

Eyal