On Sat, Jun 09, 2018 at 12:10:44PM +0200, Stanislaw Gruszka wrote:
> 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: b305a6ab0247 ("mt7601u: use EWMA to calculate avg_rssi")
The patch is quite obvious, but still had to be tested, at least out of
principle. And unsurprisingly, no Earth-shattering kaboom.
> Reported-by: Adam Borowski <[email protected]>
> Signed-off-by: Stanislaw Gruszka <[email protected]>
> ---
> drivers/net/wireless/mediatek/mt7601u/phy.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/mediatek/mt7601u/phy.c
> b/drivers/net/wireless/mediatek/mt7601u/phy.c
> index d440c550bdb1..3ffc8d19285b 100644
> --- a/drivers/net/wireless/mediatek/mt7601u/phy.c
> +++ b/drivers/net/wireless/mediatek/mt7601u/phy.c
> @@ -985,13 +985,15 @@ 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);
> --
> 1.9.3
Meow!
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