diff options
| author | Orr Mazor <orr.mazor@tandemg.com> | 2019-12-22 14:55:31 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-05 14:18:21 +0000 |
| commit | 2dbb6faebb94d6d5ae87e5ea6be9280c366393e1 (patch) | |
| tree | 6ddf7828b62340536c84ac869e75516bd37c22ff /net/mac80211 | |
| parent | 8f6b2439a2b939d92b25201e456c7949a1f8ba79 (diff) | |
cfg80211: Fix radar event during another phy CAC
[ Upstream commit 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d ]
In case a radar event of CAC_FINISHED or RADAR_DETECTED
happens during another phy is during CAC we might need
to cancel that CAC.
If we got a radar in a channel that another phy is now
doing CAC on then the CAC should be canceled there.
If, for example, 2 phys doing CAC on the same channels,
or on comptable channels, once on of them will finish his
CAC the other might need to cancel his CAC, since it is no
longer relevant.
To fix that the commit adds an callback and implement it in
mac80211 to end CAC.
This commit also adds a call to said callback if after a radar
event we see the CAC is no longer relevant
Signed-off-by: Orr Mazor <Orr.Mazor@tandemg.com>
Reviewed-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20191222145449.15792-1-Orr.Mazor@tandemg.com
[slightly reformat/reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/cfg.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index d437007b15bb..b1484b8316e8 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2800,6 +2800,28 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, return err; } +static void ieee80211_end_cac(struct wiphy *wiphy, + struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; + + mutex_lock(&local->mtx); + list_for_each_entry(sdata, &local->interfaces, list) { + /* it might be waiting for the local->mtx, but then + * by the time it gets it, sdata->wdev.cac_started + * will no longer be true + */ + cancel_delayed_work(&sdata->dfs_cac_timer_work); + + if (sdata->wdev.cac_started) { + ieee80211_vif_release_channel(sdata); + sdata->wdev.cac_started = false; + } + } + mutex_unlock(&local->mtx); +} + static struct cfg80211_beacon_data * cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon) { @@ -3730,6 +3752,7 @@ const struct cfg80211_ops mac80211_config_ops = { #endif .get_channel = ieee80211_cfg_get_channel, .start_radar_detection = ieee80211_start_radar_detection, + .end_cac = ieee80211_end_cac, .channel_switch = ieee80211_channel_switch, .set_qos_map = ieee80211_set_qos_map, .set_ap_chanwidth = ieee80211_set_ap_chanwidth, |