kernel compile fails without AH_SUPPORT_AR5416

Sam Leffler sam at
Fri May 1 17:34:45 UTC 2009

Bruce Simpson wrote:
> Sam Leffler wrote:
>> ...
>>>>> the "ath_hal" device.
>>> Do not modify ah_desc.h like you've done.  Add this to conf/options
>>> ATH_HAL   opt_ah.h
>>> and use that to enable AH_SUPPORT_AR5416.
>> To clarify the first comment: you've made it impossible to build code 
>> w/o the extended format descriptor; this is what I find unacceptable.
> Ah, of course, duh -- I forgot about the CaPiTalIzAtion of the device 
> name gets pulled into config(5) with the 'device' keyword. Thanks for 
> the reminder...
> This is a much cleaner fix for the issue than forcing the option to be 
> set on always. It looks like HEAD has this issue too and this can go 
> right in there.
> Are we happy with AH_SUPPORT_AR5416 being enabled in 7.x GENERIC?
> The 'out of box' config hasn't been broken by the change and this is 
> identical to to the situation in HEAD as far as I can see.

Not sure I understand your last question.  If you fix the code so it's 
not dependent on "options AH_SUPPORT_AR5416" then you can just remove it 
from the GENERIC config files.  Otherwise the intent was that "device 
ath_hal" would enable all available chip support so yes we want support 
for 5416 and later parts.

In fact AH_SUPPORT_AR5416 is probably not needed at all; we can 
conditionalize the code according to the device config; e.g.

#if defined(ATH_HAL) || defined(ATH_AR5416) || defined(ATH_AR9160) || 

or possibly consolidate this check in one spot and define something like 
AH_SUPPORT_AR5416 to enable the extended descriptor format support.

Beware of driver code that depends on AH_SUPPORT_AR5416 (grep shows 
several uses).

For now just fixing the immediate problem is sufficient; I'll get to 
cleaning this stuff up later (unless you care to deal with it).


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