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Re: [PATCH 2/4] ath9k: rework power state handling

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In fact, could this be made contingent on whether there's an AP-mode
interface, since the problem you're encountering seems to only be in
AP mode?  What troubles me, Felix, is your statement that " this
series fixes some "PCI error" crashes".  Does this mean that you
haven't root-caused the problem, and that this may only partially mask
it?

--
Paul

On Wed, Nov 16, 2011 at 10:23 AM, Luis R. Rodriguez
<mcgrof@xxxxxxxxxxxxxxxx> wrote:
> On Wed, Nov 16, 2011 at 10:16 AM, Felix Fietkau <nbd@xxxxxxxx> wrote:
>> On 16.11.2011, at 18:42, "Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx> wrote:
>>
>>> On Wed, Nov 16, 2011 at 4:08 AM, Felix Fietkau <nbd@xxxxxxxxxxx> wrote:
>>>> Turning off the radio when mac80211 tells the driver that it's idle is not
>>>> a good idea, as idle interfaces might still occasionally scan or send packets.
>>>> The only time the radio can be safely turned off is when drv_stop has been
>>>> called. In the mean time, use sc->ps_idle only to indicate network sleep vs
>>>> full sleep.
>>>> Move the LED GPIO changes out of the PCI suspend/resume path, the start/stop
>>>> functions already take care of that.
>>>>
>>>> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
>>>
>>> This set of patches are going to need some good amount of testing for
>>> power impact. The benefits and gains need to be considered. I'll yield
>>> to Senthil and Paul for final approval on this.
>>
>> One of the gains is that this series fixes some "PCI error" crashes
>> on OpenWrt during hostapd restarts.
>
> Thanks for the clarification, I was expecting this to be the case, the
> point I am trying to make though is that this "fix" itself may
> introduce a regression for non-AP devices, specifically in terms of
> power consumption and I'd like the stakeholders who do care about that
> to review these changes carefully as well. The difficulty will be to
> find a reasonable middle ground.
>
>  Luis
>
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