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Message-ID: <2d921af3-9d21-7d86-e6da-bfcd904513e9@broadcom.com>
Date:   Tue, 14 Jun 2022 10:41:44 +0200
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Subject: Re: brcmfmac
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
To:     Sebastian Gottschall <s.gottschall@newmedia-net.de>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        Hranislav Milenkovic <hmilenkovic@protonmail.com>
References: <ummn1_Vf6iygnVWDDcx07aAvrz2wPRnpMWB6A205JWSOMEYGVkGv0_uWYymiZTO7bManVdxSskozUDe_TcYAn6loKaOAptYNT2pl-Tu6q-g=@protonmail.com>
 <dac01b50-c559-c40a-871a-4da514e7c3a3@broadcom.com>
In-Reply-To: <dac01b50-c559-c40a-871a-4da514e7c3a3@broadcom.com>
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On 6/13/2022 11:19 AM, Arend van Spriel wrote:
> On 6/12/2022 5:49 PM, Hranislav Milenkovic wrote:
>> Hi Arend,
>> I fouded your e-mail here 
>> https://wireless.wiki.kernel.org/en/users/drivers/brcm80211 
>> <https://wireless.wiki.kernel.org/en/users/drivers/brcm80211>
>> I have netgear R8000 with brcm 43602 wifi chip. I am using ddwrt with 
>> experimental build. There are 2 versions of build, normal with dhd and 
>> experimental with brvmfmac driver 
>> https://dd-wrt.com/support/other-downloads/?path=betas%2F2022%2F06-10-2022-r49139%2Fnetgear-r8000%2F 
>> <https://dd-wrt.com/support/other-downloads/?path=betas%2F2022%2F06-10-2022-r49139%2Fnetgear-r8000%2F> 
>>
>> Router crashes sometimes and I emailed ddwrt devs with crashlog... but 
>> they told me
>>
>> "there is nothing to fix. its a firmware error. broadcom does not 
>> provide support for these firmwares . I cannot fix the firmware error 
>> for that chipset. its a binary. we can only seek for a newer firmware 
>> binary somewhere in the wild..."
> 
> Looked at the log and ddwrt devs are mistaken. In the log it shows:
> 
>   Jun 12 13:26:00 109.198.5.214 logger : calling done start_checkhostapd
>   Jun 12 13:26:07 109.198.5.214 kernel [ 4743.815344] ieee80211 phy2: 
> brcmf_fil_cmd_data: Firmware error:  (-23) cmd 262
>   Jun 12 13:27:04 109.198.5.214 kernel [ 4800.660849] Unable to handle 
> kernel NULL pointer dereference at virtual address 00000058
> 
> So there is a command failing in firmware with error -23, but this is 
> harmless. The NULL pointer dereference is a driver crash. Can you build 
> the kernel with CONFIG_DEBUG_INFO and provide me with the brcmfmac 
> kernel module, ie. brcmfmac.ko?

Hi Sebastian,

I heared from Hranislav that you have a modified version of brcmfmac so 
it would not help me to get a .ko with debug info from you. So decided 
to ask you directly. I doubt you modified much in flowring.c. Not sure 
about fweh.c, but these are the two source files I am interested in. 
Also I am not scared to look at the ARM assembly so anything you can 
throw at me would work.

Regards,
Arend

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