Re: [RFC] ath9k: Fix ath9k prevents CPU to enter C3 states

On Wednesday 09 February 2011 10:18 PM, Richard Schütz wrote:

quoted

From: Mohammed Shafi Shajakhan<redacted>

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<redacted>
     

Acked-By: Richard Schütz<redacted>
   

Thanks, but we got to consider user space approach which Luis had mentioned.

Looks good to me with the exception of ATH9K_PM_QOS_DEFAULT_VALUE. But
John already mentioned that.