4.20-stable review patch. If anyone has any objections, please let me know.
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From: Stanislaw Gruszka sgruszka@redhat.com
commit 4784a3cc3fffd0ba5ef6c7a23980ae0318fc1369 upstream.
Assure that after we initialize dev->cal.low_gain to -1 this will cause update gain calibration. Otherwise this might or might not happen depending on value of second bit of low_gain and values read from registers in mt76x02_phy_adjust_vga_gain().
Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Stanislaw Gruszka sgruszka@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/mediatek/mt76/mt76x0/main.c | 5 ++++- drivers/net/wireless/mediatek/mt76/mt76x0/phy.c | 3 ++- 2 files changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/main.c @@ -139,8 +139,11 @@ void mt76x0_sw_scan_complete(struct ieee
clear_bit(MT76_SCANNING, &dev->mt76.state);
- if (dev->cal.gain_init_done) + if (dev->cal.gain_init_done) { + /* Restore AGC gain and resume calibration after scanning. */ + dev->cal.low_gain = -1; ieee80211_queue_delayed_work(hw, &dev->cal_work, 0); + } } EXPORT_SYMBOL_GPL(mt76x0_sw_scan_complete);
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c @@ -834,7 +834,8 @@ mt76x0_phy_update_channel_gain(struct mt low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) + (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev));
- gain_change = (dev->cal.low_gain & 2) ^ (low_gain & 2); + gain_change = dev->cal.low_gain < 0 || + (dev->cal.low_gain & 2) ^ (low_gain & 2); dev->cal.low_gain = low_gain;
if (!gain_change) {