From: Chad Monroe avoid unnecessary channel switch when performing an on-channel scan using a multi-radio device. Fixes: c56d6edebc1f ("wifi: mt76: mt7996: use emulated hardware scan support") Signed-off-by: Chad Monroe Link: https://patch.msgid.link/20251118102723.47997-1-nbd@nbd.name Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/scan.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/scan.c b/drivers/net/wireless/mediatek/mt76/scan.c index ff9176cdee3d..89f16c23e352 100644 --- a/drivers/net/wireless/mediatek/mt76/scan.c +++ b/drivers/net/wireless/mediatek/mt76/scan.c @@ -16,7 +16,7 @@ static void mt76_scan_complete(struct mt76_dev *dev, bool abort) clear_bit(MT76_SCANNING, &phy->state); - if (dev->scan.chan && phy->main_chandef.chan && + if (dev->scan.chan && phy->main_chandef.chan && phy->offchannel && !test_bit(MT76_MCU_RESET, &dev->phy.state)) mt76_set_channel(phy, &phy->main_chandef, false); mt76_put_vif_phy_link(phy, dev->scan.vif, dev->scan.mlink); @@ -87,6 +87,7 @@ void mt76_scan_work(struct work_struct *work) struct cfg80211_chan_def chandef = {}; struct mt76_phy *phy = dev->scan.phy; int duration = HZ / 9; /* ~110 ms */ + bool offchannel = true; int i; if (dev->scan.chan_idx >= req->n_channels) { @@ -94,7 +95,7 @@ void mt76_scan_work(struct work_struct *work) return; } - if (dev->scan.chan && phy->num_sta) { + if (dev->scan.chan && phy->num_sta && phy->offchannel) { dev->scan.chan = NULL; mt76_set_channel(phy, &phy->main_chandef, false); goto out; @@ -102,20 +103,26 @@ void mt76_scan_work(struct work_struct *work) dev->scan.chan = req->channels[dev->scan.chan_idx++]; cfg80211_chandef_create(&chandef, dev->scan.chan, NL80211_CHAN_HT20); - mt76_set_channel(phy, &chandef, true); + if (phy->main_chandef.chan == dev->scan.chan) { + chandef = phy->main_chandef; + offchannel = false; + } + + mt76_set_channel(phy, &chandef, offchannel); if (!req->n_ssids || chandef.chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR)) goto out; - duration = HZ / 16; /* ~60 ms */ + if (phy->offchannel) + duration = HZ / 16; /* ~60 ms */ local_bh_disable(); for (i = 0; i < req->n_ssids; i++) mt76_scan_send_probe(dev, &req->ssids[i]); local_bh_enable(); out: - if (dev->scan.chan) + if (dev->scan.chan && phy->offchannel) duration = max_t(int, duration, msecs_to_jiffies(req->duration + (req->duration >> 5))); -- 2.51.0