Commit 92963318 authored Jun 09, 2018 by Stanislaw Gruszka Committed by Kalle Valo Jun 24, 2018

mt7601u: remove warning when avg_rssi is zero



It turned out that we can run calibration without already received
frames with RSSI data. In such case just don't update AGC register
and don't print the warning.

Fixes: b305a6ab ("mt7601u: use EWMA to calculate avg_rssi")
Reported-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

parent f8c095f6

drivers/net/wireless/mediatek/mt7601u/phy.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -986,13 +986,15 @@ static void mt7601u_agc_tune(struct mt7601u_dev *dev)
		*/
		spin_lock_bh(&dev->con_mon_lock);
		avg_rssi = ewma_rssi_read(&dev->avg_rssi);
		WARN_ON_ONCE(avg_rssi == 0);
		spin_unlock_bh(&dev->con_mon_lock);
		if (avg_rssi == 0)
		return;

		avg_rssi = -avg_rssi;
		if (avg_rssi <= -70)
		val -= 0x20;
		else if (avg_rssi <= -60)
		val -= 0x10;
		spin_unlock_bh(&dev->con_mon_lock);

		if (val != mt7601u_bbp_rr(dev, 66))
		mt7601u_bbp_wr(dev, 66, val);

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