On Wednesday 09 February 2011 08:12 PM, John W. Linville wrote:
On Wed, Feb 09, 2011 at 08:03:27PM +0530, Mohammed Shafi Shajakhan wrote:
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>
Seems a bit unclear to me -- if you have ath9k_pm_qos_value then why
use ATH9K_PM_QOS_DEFAULT_VALUE at all?
Yes thanks, I think that macro is not needed at all with the current
approach
John
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