ath10k: workaround qca6174 sta powersave issue

qca6184 WLAN.RM.2.0-00073 has a bug in sta
powersave state machine and requires peer param to
be poked to enable the powersave.

Calling this unconditionally should be safe for
other chips/firmwares.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/mac.c

@@ -1922,6 +1922,18 @@ static void ath10k_bss_assoc(struct ieee80211_hw *hw,
 	}
 
 	arvif->is_up = true;
+
+	/* Workaround: Some firmware revisions (tested with qca6174
+	 * WLAN.RM.2.0-00073) have buggy powersave state machine and must be
+	 * poked with peer param command.
+	 */
+	ret = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, arvif->bssid,
+					WMI_PEER_DUMMY_VAR, 1);
+	if (ret) {
+		ath10k_warn(ar, "failed to poke peer %pM param for ps workaround on vdev %i: %d\n",
+			    arvif->bssid, arvif->vdev_id, ret);
+		return;
+	}
 }
 
 static void ath10k_bss_disassoc(struct ieee80211_hw *hw,

drivers/net/wireless/ath/ath10k/wmi.h

@@ -4445,7 +4445,8 @@ enum wmi_peer_param {
 	WMI_PEER_AUTHORIZE  = 0x3,
 	WMI_PEER_CHAN_WIDTH = 0x4,
 	WMI_PEER_NSS        = 0x5,
-	WMI_PEER_USE_4ADDR  = 0x6
+	WMI_PEER_USE_4ADDR  = 0x6,
+	WMI_PEER_DUMMY_VAR  = 0xff, /* dummy parameter for STA PS workaround */
 };
 
 struct wmi_peer_set_param_cmd {