linux-kernel - Re: [68/83] ath9k: Disable PowerSave by default

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Date:	Mon, 17 Jun 2013 10:55:22 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	akpm@...ux-foundation.org,
	"Sujith Manoharan" <c_manoha@....qualcomm.com>,
	"John W. Linville" <linville@...driver.com>
Subject: Re: [68/83] ath9k: Disable PowerSave by default

Ben Hutchings <ben@...adent.org.uk> writes:

> 3.2.47-rc1 review patch.  If anyone has any objections, please let me know.
>
> ------------------
>
> From: Sujith Manoharan <c_manoha@....qualcomm.com>
>
> commit 73c79617596b89a3693ff0d89d42bcd5ddedcf15 upstream.

This SHA1 seems to be wrong, you probably meant
531671cb17af07281e6f28c1425f754346e65c41.

Cheers,
-- 
Luis

>
> Almost all the DMA issues which have plagued ath9k (in station mode)
> for years are related to PS. Disabling PS usually "fixes" the user's
> connection stablility. Reports of DMA problems are still trickling in
> and are sitting in the kernel bugzilla. Until the PS code in ath9k is
> given a thorough review, disbale it by default. The slight increase
> in chip power consumption is a small price to pay for improved link
> stability.
>
> Signed-off-by: Sujith Manoharan <c_manoha@....qualcomm.com>
> Signed-off-by: John W. Linville <linville@...driver.com>
> ---
>  drivers/net/wireless/ath/ath9k/init.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> --- a/drivers/net/wireless/ath/ath9k/init.c
> +++ b/drivers/net/wireless/ath/ath9k/init.c
> @@ -691,8 +691,7 @@ void ath9k_set_hw_capab(struct ath_softc
>  		BIT(NL80211_IFTYPE_ADHOC) |
>  		BIT(NL80211_IFTYPE_MESH_POINT);
>  
> -	if (AR_SREV_5416(sc->sc_ah))
> -		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
> +	hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
>  
>  	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
>  
>
> --
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