From 77dcc6233e0def71e104d728ab5a39c2fca51127 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 1 Mar 2019 23:48:19 +0100 Subject: mac80211_hwsim: Replace hrtimer tasklet with softirq hrtimer Switch the timer to HRTIMER_MODE_REL_SOFT, which executed the timer callback in softirq context and remove the hrtimer_tasklet. Signed-off-by: Thomas Gleixner Signed-off-by: Anna-Maria Gleixner Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Reviewed-by: Johannes Berg Acked-by: David S. Miller Cc: netdev@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: Kalle Valo Link: https://lkml.kernel.org/r/20190301224821.29843-2-bigeasy@linutronix.de --- drivers/net/wireless/mac80211_hwsim.c | 46 ++++++++++++++++------------------- 1 file changed, 21 insertions(+), 25 deletions(-) (limited to 'drivers') diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 0838af04d681..2a407a71bcd1 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -521,7 +521,7 @@ struct mac80211_hwsim_data { unsigned int rx_filter; bool started, idle, scanning; struct mutex mutex; - struct tasklet_hrtimer beacon_timer; + struct hrtimer beacon_timer; enum ps_mode { PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL } ps; @@ -1460,7 +1460,7 @@ static void mac80211_hwsim_stop(struct ieee80211_hw *hw) { struct mac80211_hwsim_data *data = hw->priv; data->started = false; - tasklet_hrtimer_cancel(&data->beacon_timer); + hrtimer_cancel(&data->beacon_timer); wiphy_dbg(hw->wiphy, "%s\n", __func__); } @@ -1583,14 +1583,12 @@ static enum hrtimer_restart mac80211_hwsim_beacon(struct hrtimer *timer) { struct mac80211_hwsim_data *data = - container_of(timer, struct mac80211_hwsim_data, - beacon_timer.timer); + container_of(timer, struct mac80211_hwsim_data, beacon_timer); struct ieee80211_hw *hw = data->hw; u64 bcn_int = data->beacon_int; - ktime_t next_bcn; if (!data->started) - goto out; + return HRTIMER_NORESTART; ieee80211_iterate_active_interfaces_atomic( hw, IEEE80211_IFACE_ITER_NORMAL, @@ -1601,12 +1599,9 @@ mac80211_hwsim_beacon(struct hrtimer *timer) bcn_int -= data->bcn_delta; data->bcn_delta = 0; } - - next_bcn = ktime_add(hrtimer_get_expires(timer), - ns_to_ktime(bcn_int * 1000)); - tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS); -out: - return HRTIMER_NORESTART; + hrtimer_forward(&data->beacon_timer, hrtimer_get_expires(timer), + ns_to_ktime(bcn_int * NSEC_PER_USEC)); + return HRTIMER_RESTART; } static const char * const hwsim_chanwidths[] = { @@ -1680,15 +1675,15 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) mutex_unlock(&data->mutex); if (!data->started || !data->beacon_int) - tasklet_hrtimer_cancel(&data->beacon_timer); - else if (!hrtimer_is_queued(&data->beacon_timer.timer)) { + hrtimer_cancel(&data->beacon_timer); + else if (!hrtimer_is_queued(&data->beacon_timer)) { u64 tsf = mac80211_hwsim_get_tsf(hw, NULL); u32 bcn_int = data->beacon_int; u64 until_tbtt = bcn_int - do_div(tsf, bcn_int); - tasklet_hrtimer_start(&data->beacon_timer, - ns_to_ktime(until_tbtt * 1000), - HRTIMER_MODE_REL); + hrtimer_start(&data->beacon_timer, + ns_to_ktime(until_tbtt * NSEC_PER_USEC), + HRTIMER_MODE_REL_SOFT); } return 0; @@ -1751,7 +1746,7 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, info->enable_beacon, info->beacon_int); vp->bcn_en = info->enable_beacon; if (data->started && - !hrtimer_is_queued(&data->beacon_timer.timer) && + !hrtimer_is_queued(&data->beacon_timer) && info->enable_beacon) { u64 tsf, until_tbtt; u32 bcn_int; @@ -1759,9 +1754,10 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, tsf = mac80211_hwsim_get_tsf(hw, vif); bcn_int = data->beacon_int; until_tbtt = bcn_int - do_div(tsf, bcn_int); - tasklet_hrtimer_start(&data->beacon_timer, - ns_to_ktime(until_tbtt * 1000), - HRTIMER_MODE_REL); + + hrtimer_start(&data->beacon_timer, + ns_to_ktime(until_tbtt * NSEC_PER_USEC), + HRTIMER_MODE_REL_SOFT); } else if (!info->enable_beacon) { unsigned int count = 0; ieee80211_iterate_active_interfaces_atomic( @@ -1770,7 +1766,7 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, wiphy_dbg(hw->wiphy, " beaconing vifs remaining: %u", count); if (count == 0) { - tasklet_hrtimer_cancel(&data->beacon_timer); + hrtimer_cancel(&data->beacon_timer); data->beacon_int = 0; } } @@ -2922,9 +2918,9 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); - tasklet_hrtimer_init(&data->beacon_timer, - mac80211_hwsim_beacon, - CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_init(&data->beacon_timer, CLOCK_MONOTONIC, + HRTIMER_MODE_ABS_SOFT); + data->beacon_timer.function = mac80211_hwsim_beacon; err = ieee80211_register_hw(hw); if (err < 0) { -- cgit