From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nbd.name ([88.198.39.176]:38532 "EHLO ds10.nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751645Ab0BSRVu (ORCPT ); Fri, 19 Feb 2010 12:21:50 -0500 Message-ID: <4B7EC8A6.8010701@openwrt.org> Date: Fri, 19 Feb 2010 18:21:42 +0100 From: Felix Fietkau MIME-Version: 1.0 To: linux-wireless CC: "Luis R. Rodriguez" , "John W. Linville" Subject: [PATCH] ath9k: fix beacon timer restart after a card reset Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: In AP mode, ath_beacon_config_ap only restarts the timer if a TSF restart is requested. Apparently this was added, because this function unconditionally sets the flag for TSF reset. The problem with this is, that ath9k_hw_reset() clobbers the timer registers (specified in the initvals), thus effectively disabling the SWBA interrupt whenever a card reset without TSF reset is issued (happens in a few places in the code). This patch fixes ath_beacon_config_ap to only issue the TSF reset flag when necessary, but reinitialize the timer unconditionally. Tests show, that this is enough to keep the SWBA interrupt going after a call to ath_reset() Signed-off-by: Felix Fietkau Cc: stable@kernel.org --- --- a/drivers/net/wireless/ath/ath9k/beacon.c +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -526,16 +526,13 @@ static void ath_beacon_config_ap(struct { u32 nexttbtt, intval; - /* Configure the timers only when the TSF has to be reset */ - - if (!(sc->sc_flags & SC_OP_TSF_RESET)) - return; - /* NB: the beacon interval is kept internally in TU's */ intval = conf->beacon_interval & ATH9K_BEACON_PERIOD; intval /= ATH_BCBUF; /* for staggered beacons */ nexttbtt = intval; - intval |= ATH9K_BEACON_RESET_TSF; + + if (sc->sc_flags & SC_OP_TSF_RESET) + intval |= ATH9K_BEACON_RESET_TSF; /* * In AP mode we enable the beacon timers and SWBA interrupts to