On Fri, Dec 22, 2023 at 12:45 AM Martin Kaistra
<martin.kaistra@xxxxxxxxxxxxx> wrote:
>
> Check first whether priv->vifs[0] exists and is of type STATION, then go
> to priv->vifs[1]. Make sure to call refresh_rate_mask for both
> interfaces.
>
> Signed-off-by: Martin Kaistra <martin.kaistra@xxxxxxxxxxxxx>
> ---
> .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 19 +++++++++++--------
> 1 file changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
> index c5b71892369c9..fd0108668bcda 100644
> --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
> +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
> @@ -7200,11 +7200,15 @@ static void rtl8xxxu_watchdog_callback(struct work_struct *work)
> {
> struct ieee80211_vif *vif;
> struct rtl8xxxu_priv *priv;
> + int i;
>
> priv = container_of(work, struct rtl8xxxu_priv, ra_watchdog.work);
> - vif = priv->vif;
> + for (i = 0; i < ARRAY_SIZE(priv->vifs); i++) {
> + vif = priv->vifs[i];
> +
> + if (!vif || vif->type != NL80211_IFTYPE_STATION)
> + continue;
Currently, this loop becomes to get RSSI and update rate mask, but only for
station mode. That means we don't update them for peer stations in AP mode.
Maybe, we need ieee80211_iterate_stations_atomic() for all stations, but
ieee80211_ave_rssi() is only for 'vif', so we need to add a driver level
RSSI for all stations (macid). Also, we need to extend priv->rssi_level for
all macid as well.
I suppose _default_ value can work to stations in AP mode, so you can decide
if you will defer this support temporarily.
(Sorry, I don't dig rtl8xxxu very deeply, so I'm not able to tell you all
things in one go.)
>
> - if (vif && vif->type == NL80211_IFTYPE_STATION) {
> int signal;
> struct ieee80211_sta *sta;
>
> @@ -7215,22 +7219,21 @@ static void rtl8xxxu_watchdog_callback(struct work_struct *work)
>
> dev_dbg(dev, "%s: no sta found\n", __func__);
> rcu_read_unlock();
> - goto out;
> + continue;
> }
> rcu_read_unlock();
>
> signal = ieee80211_ave_rssi(vif);
>
> - priv->fops->report_rssi(priv, 0,
> + priv->fops->report_rssi(priv, rtl8xxxu_get_macid(priv, sta),
> rtl8xxxu_signal_to_snr(signal));
>
> - if (priv->fops->set_crystal_cap)
> - rtl8xxxu_track_cfo(priv);
> -
> rtl8xxxu_refresh_rate_mask(priv, signal, sta, false);
It seems like 'sta' isn't protected by RCU read lock.
(an existing bug, not introduced by this patch)
> }
>
> -out:
> + if (priv->fops->set_crystal_cap)
> + rtl8xxxu_track_cfo(priv);
> +
> schedule_delayed_work(&priv->ra_watchdog, 2 * HZ);
> }
>
> --
> 2.39.2
>
>
