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[v6,02/12] wcn36xx: Run suspend for the first ieee80211_vif

Message ID 20210605011140.2004643-3-bryan.odonoghue@linaro.org
State New
Headers show
Series wcn36xx: Enable downstream consistent Wake on Lan | expand

Commit Message

Bryan O'Donoghue June 5, 2021, 1:11 a.m. UTC 
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.

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@linaro.org>

Tested-by: Benjamin Li <benl@squareup.com>

---
 drivers/net/wireless/ath/wcn36xx/main.c | 31 ++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

-- 
2.30.1
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Patch

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index b361e40697a6..9a97a288a96f 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1088,15 +1088,34 @@  static int wcn36xx_sta_remove(struct ieee80211_hw *hw,
 
 #ifdef CONFIG_PM
 
+static struct ieee80211_vif *wcn36xx_get_first_assoc_vif(struct wcn36xx *wcn)
+{
+	struct wcn36xx_vif *vif_priv = NULL;
+	struct ieee80211_vif *vif = NULL;
+
+	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
+		if (vif_priv->sta_assoc) {
+			vif = wcn36xx_priv_to_vif(vif_priv);
+			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;
+	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_assoc_vif(wcn);
+	if (vif)
+		ret = wcn36xx_smd_set_power_params(wcn, true);
+	mutex_unlock(&wcn->conf_mutex);
 
 	return ret;
 }
@@ -1104,11 +1123,17 @@  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;
 
 	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_assoc_vif(wcn);
+	if (vif)
+		wcn36xx_smd_set_power_params(wcn, false);
+	mutex_unlock(&wcn->conf_mutex);
+
 	return 0;
 }