From: Mohammed Shafi Shajakhan<mshajakhan@xxxxxxxxxxx>
The DMA latency issue is observed only in Intel pinetrail platforms but
in the driver we had a default PM-QOS value of 55. This caused
unnecessary power consumption and battery drain in other platforms.
Address this issue by disabling PM-QOS by default by setting it's value
as '0' and making code changes appropriately.This addresses the bug:
https://bugzilla.kernel.org/show_bug.cgi?id=27532
If the user sees some DMA latency issue he can still use the pmqos as a
module parameter to trade power for throughput as below:
sudo modprobe ath9k pmqos=55
Signed-off-by: Mohammed Shafi Shajakhan<mshajakhan@xxxxxxxxxxx>
Acked-By: Richard Schütz <r.schtz@xxxxxxxxxxx>
Looks good to me with the exception of ATH9K_PM_QOS_DEFAULT_VALUE. But
John already mentioned that.
--
Regards,
Richard Schütz
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