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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 <tglx@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: Kalle Valo <kvalo@codeaurora.org>
Link: https://lkml.kernel.org/r/20190301224821.29843-2-bigeasy@linutronix.de
This commit is contained in:
Thomas Gleixner 2019-03-01 23:48:19 +01:00
parent 9e98c678c2
commit 77dcc6233e
1 changed files with 21 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/net/wireless/mac80211_hwsim.c
View File

@ -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) {