Re: [REGRESSION] 3.10.{6,7} crashes on network activity

["Arend van Spriel" <arend@broadcom.com>]

On 08/20/2013 07:36 PM, Felix Fietkau wrote:
> On 2013-08-20 10:15 AM, Arend van Spriel wrote:
>> Hi Felix,
>>
>> I have been diving into root causing why brcmsmac can not handle cck
>> fallback rates, because it should. Maybe it is better to flag no cck
>> support and only change brcmsmac.
> I prefer having a flag to enable it over one to disable it, because it
> fits better with the existing flags. Also, future drivers may not always
> be properly prepared to handle CCK in A-MPDU sessions either.

Ok. It just looked a bit strange that a problem in brcmsmac results in 
changing other drivers.

> By the way, I took a short look at brcmsmac and found more issues that
> you should look into if you want to fix this.
>
> First of all, you should probably make sure that the hardware does not
> try to send an A-MPDU using a CCK rate (prepare it as a single frame in
> brcms_c_ampdu_add_frame). It also does not seem to have any checks to
> ensure that rate control probing frames are not aggregated.

Thanks, Felix. I also noticed that our proprietary driver has code in 
place for these scenarios.

Gr. AvS