091a79fd42
mac80211 .start(), .stop() callbacks are never called concurrently with other callbacks. The only concurencly is with mt76 works which we cancel on stop() and schedule on start(). This fixes possible deadlock on cancel_delayed_work_sync(&dev->mac_work) as mac_work also take mutex. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "mt76x2u.h"
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static int mt76x2u_start(struct ieee80211_hw *hw)
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{
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struct mt76x02_dev *dev = hw->priv;
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int ret;
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ret = mt76x2u_mac_start(dev);
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if (ret)
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return ret;
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ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
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MT_MAC_WORK_INTERVAL);
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set_bit(MT76_STATE_RUNNING, &dev->mt76.state);
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return 0;
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}
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static void mt76x2u_stop(struct ieee80211_hw *hw)
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{
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struct mt76x02_dev *dev = hw->priv;
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clear_bit(MT76_STATE_RUNNING, &dev->mt76.state);
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mt76u_stop_tx(&dev->mt76);
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mt76x2u_stop_hw(dev);
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}
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static int
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mt76x2u_set_channel(struct mt76x02_dev *dev,
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struct cfg80211_chan_def *chandef)
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{
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int err;
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cancel_delayed_work_sync(&dev->cal_work);
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set_bit(MT76_RESET, &dev->mt76.state);
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mt76_set_channel(&dev->mt76);
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dev->beacon_ops->pre_tbtt_enable(dev, false);
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mt76x2_mac_stop(dev, false);
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err = mt76x2u_phy_set_channel(dev, chandef);
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mt76x2_mac_resume(dev);
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mt76x02_edcca_init(dev, true);
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dev->beacon_ops->pre_tbtt_enable(dev, true);
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clear_bit(MT76_RESET, &dev->mt76.state);
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mt76_txq_schedule_all(&dev->mt76);
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return err;
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}
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static int
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mt76x2u_config(struct ieee80211_hw *hw, u32 changed)
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{
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struct mt76x02_dev *dev = hw->priv;
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int err = 0;
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mutex_lock(&dev->mt76.mutex);
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if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
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if (!(hw->conf.flags & IEEE80211_CONF_MONITOR))
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dev->mt76.rxfilter |= MT_RX_FILTR_CFG_PROMISC;
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else
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dev->mt76.rxfilter &= ~MT_RX_FILTR_CFG_PROMISC;
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mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
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}
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if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
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ieee80211_stop_queues(hw);
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err = mt76x2u_set_channel(dev, &hw->conf.chandef);
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ieee80211_wake_queues(hw);
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}
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if (changed & IEEE80211_CONF_CHANGE_POWER) {
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dev->mt76.txpower_conf = hw->conf.power_level * 2;
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/* convert to per-chain power for 2x2 devices */
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dev->mt76.txpower_conf -= 6;
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if (test_bit(MT76_STATE_RUNNING, &dev->mt76.state))
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mt76x2_phy_set_txpower(dev);
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}
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mutex_unlock(&dev->mt76.mutex);
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return err;
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}
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const struct ieee80211_ops mt76x2u_ops = {
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.tx = mt76x02_tx,
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.start = mt76x2u_start,
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.stop = mt76x2u_stop,
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.add_interface = mt76x02_add_interface,
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.remove_interface = mt76x02_remove_interface,
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.sta_state = mt76_sta_state,
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.set_key = mt76x02_set_key,
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.ampdu_action = mt76x02_ampdu_action,
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.config = mt76x2u_config,
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.wake_tx_queue = mt76_wake_tx_queue,
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.bss_info_changed = mt76x02_bss_info_changed,
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.configure_filter = mt76x02_configure_filter,
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.conf_tx = mt76x02_conf_tx,
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.sw_scan_start = mt76x02_sw_scan,
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.sw_scan_complete = mt76x02_sw_scan_complete,
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.sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,
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.get_txpower = mt76_get_txpower,
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.set_tim = mt76_set_tim,
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.release_buffered_frames = mt76_release_buffered_frames,
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};
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