On Fri, 19 Mar 2021 at 17:13, Bryan O'Donoghue
<bryan.odonoghue@xxxxxxxxxx> wrote:
>
> A subsequent set of patches will extend out suspend/resume support in this
> driver, we cannot set the firmware up for multiple ipv4/ipv6 addresses and
> as such we can't iterate through a list of ieee80211_vif.
You mean connection can only be maintained (offloaded) in suspend for
only one vif? If so maybe what you want to retrieve is the first
client-associated vif and not the first vif.
>
> Constrain the interaction with the firmware to the first ieee80211_vif on
> the suspend/resume/wowlan path.
>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
> ---
> drivers/net/wireless/ath/wcn36xx/main.c | 43 +++++++++++++++++++++++--
> 1 file changed, 40 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
> index b361e40697a6..c0c1ea18864f 100644
> --- a/drivers/net/wireless/ath/wcn36xx/main.c
> +++ b/drivers/net/wireless/ath/wcn36xx/main.c
> @@ -1088,15 +1088,39 @@ static int wcn36xx_sta_remove(struct ieee80211_hw *hw,
>
> #ifdef CONFIG_PM
>
> +struct ieee80211_vif *wcn36xx_get_first_vif(struct wcn36xx *wcn)
> +{
> + struct wcn36xx_vif *tmp;
> + struct ieee80211_vif *vif = NULL;
> +
> + list_for_each_entry(tmp, &wcn->vif_list, list) {
> + vif = wcn36xx_priv_to_vif(tmp);
> + if (vif)
> + break;
> + }
> + return vif;
> +}
> +
> static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
> {
> struct wcn36xx *wcn = hw->priv;
> - int ret;
> + struct ieee80211_vif *vif = NULL;
> + struct wcn36xx_vif *vif_priv = NULL;
> + int ret = 0;
>
> wcn36xx_dbg(WCN36XX_DBG_MAC, "mac suspend\n");
>
> flush_workqueue(wcn->hal_ind_wq);
> - ret = wcn36xx_smd_set_power_params(wcn, true);
> + mutex_lock(&wcn->conf_mutex);
> + vif = wcn36xx_get_first_vif(wcn);
> + if (vif) {
> + vif_priv = wcn36xx_vif_to_priv(vif);
> + if (!vif_priv->sta_assoc)
> + goto out;
> + ret = wcn36xx_smd_set_power_params(wcn, true);
> + }
> +out:
> + mutex_unlock(&wcn->conf_mutex);
>
> return ret;
> }
> @@ -1104,11 +1128,24 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
> static int wcn36xx_resume(struct ieee80211_hw *hw)
> {
> struct wcn36xx *wcn = hw->priv;
> + struct ieee80211_vif *vif = NULL;
> + struct wcn36xx_vif *vif_priv = NULL;
>
> wcn36xx_dbg(WCN36XX_DBG_MAC, "mac resume\n");
>
> flush_workqueue(wcn->hal_ind_wq);
> - wcn36xx_smd_set_power_params(wcn, false);
> + mutex_lock(&wcn->conf_mutex);
> + vif = wcn36xx_get_first_vif(wcn);
> + if (vif) {
> + vif_priv = wcn36xx_vif_to_priv(vif);
> + if (!vif_priv->sta_assoc)
> + goto out;
> +
> + wcn36xx_smd_set_power_params(wcn, false);
> + }
> +out:
> + mutex_unlock(&wcn->conf_mutex);
> +
> return 0;
> }
>
> --
> 2.30.1
>
