> -----------------
>
> From: Luis R. Rodriguez <lrodriguez@atheros.com>
>
> commit 14acdde6e527950f66c084dbf19bad6fbfcaeedc upstream.
>
> The newer single chip hardware family of chipsets have not been
> experiencing issues with power saving set by default with recent
> fixes merged (even into stable). The remaining issues are only
> reported with AR5416 and since enabling PS by default can increase
> power savings considerably best to take advantage of that feature
> as this has been tested properly.
>
> For more details on this issue see the bug report:
>
>
http://bugzilla.kernel.org/show_bug.cgi?id=14267
>
> We leave AR5416 with PS disabled by default, that seems to require
> some more work.
>
> Cc: Peter Stuge <peter@stuge.se>
> Cc: Justin P. Mattock <justinmattock@gmail.com>
> Cc: Kristoffer Ericson <kristoffer.ericson@gmail.com>
> Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
> Signed-off-by: John W. Linville <linville@tuxdriver.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
>
> ---
> drivers/net/wireless/ath/ath9k/main.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> --- a/drivers/net/wireless/ath/ath9k/main.c
> +++ b/drivers/net/wireless/ath/ath9k/main.c
> @@ -1849,6 +1849,8 @@ bad_free_hw:
>
> void ath_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
> {
> + struct ath_hw *ah = sc->sc_ah;
> +
> hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
> IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
> IEEE80211_HW_SIGNAL_DBM |
> @@ -1866,7 +1868,8 @@ void ath_set_hw_capab(struct ath_softc *
> BIT(NL80211_IFTYPE_ADHOC) |
> BIT(NL80211_IFTYPE_MESH_POINT);
>
> - hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
> + if (AR_SREV_5416(ah))
> + hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
>
> hw->queues = 4;
> hw->max_rates = 4;
>
>
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