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Re: [RFC] iwlwifi: refactor the TX / RX ampdu override

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On 02/12/2014 04:04 PM, Stanislaw Gruszka wrote:
> On Wed, Feb 12, 2014 at 12:27:05PM +0000, Grumbach, Emmanuel wrote:
>>> I think we can keep IWL_DISABLE_HT_ALL option. I should be possible to
>>> make some per-device type default settings and if disable_11n == 0 use
>>> them. Otherwise use settings from module parameter. Will that work ?
>>
>> I'd prefer to have the default based on the iwldvm vs. iwlmvm instead of adding yet another per-HW field. But yeah - it is possible.
> 
> I re-think changing default settings do disable TX AGG and must tell
> that this is very odd. I would prefer to stay defaults as they are now.
> Users can disable TX aggregation using module option.

I disagree. We have bugs there - it is pretty much obvious. I remember a
tracing from 2.6.39 which was before the re-architecture I made in the
driver with clear FW bugs. I don't remember what device though.
This is why I want to disable this by default.
You asked me to do this with a module parameter and not with a Kconfig
option - I agreed.
Now - if you want to ship with a different settings, you can... but we
both know the risk.

> 
> I also not sure if that is really a firmware bug, it is rather more
> probable that TX aggregation worked pretty fine on 5100 and other older
> devices, but some driver changes broke that.

Frankly, I don't really remember that... I have to say that I might not
have been in the business at that period...
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