The patch below does not apply to the 3.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 8298383c2cd5a6d0639f1bb1781fba181bd20154 Mon Sep 17 00:00:00 2001
From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
Date: Tue, 4 Feb 2014 08:37:53 +0530
Subject: [PATCH] ath9k: Do not support PowerSave by default
Even though we make sure PowerSave is not enabled by default
by disabling the flag, WIPHY_FLAG_PS_ON_BY_DEFAULT on init,
PS could be enabled by userspace based on various factors
like battery usage etc. Since PS in ath9k is just broken
and has been untested for years, remove support for it, but
allow a user to explicitly enable it using a module parameter.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index c36de303c8f3..1fc2e5a26b52 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -57,6 +57,10 @@ static int ath9k_bt_ant_diversity;
module_param_named(bt_ant_diversity, ath9k_bt_ant_diversity, int, 0444);
MODULE_PARM_DESC(bt_ant_diversity, "Enable WLAN/BT RX antenna diversity");
+static int ath9k_ps_enable;
+module_param_named(ps_enable, ath9k_ps_enable, int, 0444);
+MODULE_PARM_DESC(ps_enable, "Enable WLAN PowerSave");
+
bool is_ath9k_unloaded;
/* We use the hw_value as an index into our private channel structure */
@@ -903,13 +907,15 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
IEEE80211_HW_SIGNAL_DBM |
- IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_PS_NULLFUNC_STACK |
IEEE80211_HW_SPECTRUM_MGMT |
IEEE80211_HW_REPORTS_TX_ACK_STATUS |
IEEE80211_HW_SUPPORTS_RC_TABLE |
IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
+ if (ath9k_ps_enable)
+ hw->flags |= IEEE80211_HW_SUPPORTS_PS;
+
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
--
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