diff --git a/core/rtw_mlme_ext.c b/core/rtw_mlme_ext.c
index 5fa2000..ebb93e5 100644
--- a/core/rtw_mlme_ext.c
+++ b/core/rtw_mlme_ext.c
@@ -12799,14 +12799,15 @@ void linked_status_chk(_adapter *padapter, u8 from_timer)
 #elif defined(CONFIG_LAYER2_ROAMING)
 		if (rtw_chk_roam_flags(padapter, RTW_ROAM_ACTIVE)) {
 			RTW_INFO("signal_strength_data.avg_val = %d\n", precvpriv->signal_strength_data.avg_val);
-			if ((precvpriv->signal_strength_data.avg_val < pmlmepriv->roam_rssi_threshold)
-				&& (rtw_get_passing_time_ms(pmlmepriv->last_roaming) >= pmlmepriv->roam_scan_int*2000)) {
+			if (precvpriv->signal_strength_data.avg_val < pmlmepriv->roam_rssi_threshold) {
+				if (rtw_get_passing_time_ms(pmlmepriv->last_roaming) >= pmlmepriv->roam_scan_int*2000) {
 #ifdef CONFIG_RTW_80211K
-				rtw_roam_nb_discover(padapter, _FALSE);
+					rtw_roam_nb_discover(padapter, _FALSE);
 #endif
-				pmlmepriv->need_to_roam = _TRUE;
-				rtw_drv_scan_by_self(padapter, RTW_AUTO_SCAN_REASON_ROAM);
-				pmlmepriv->last_roaming = rtw_get_current_time();
+					pmlmepriv->need_to_roam = _TRUE;
+					rtw_drv_scan_by_self(padapter, RTW_AUTO_SCAN_REASON_ROAM);
+					pmlmepriv->last_roaming = rtw_get_current_time();
+				}
 			} else
 				pmlmepriv->need_to_roam = _FALSE;
 		}
diff --git a/include/osdep_intf.h b/include/osdep_intf.h
index 63e535e..4b209fb 100644
--- a/include/osdep_intf.h
+++ b/include/osdep_intf.h
@@ -79,6 +79,11 @@ uint loadparam(_adapter *adapter);
 #ifdef PLATFORM_LINUX
 int rtw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)) && defined(CONFIG_MP_INCLUDED))
+int rtw_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+                       void __user *data, int cmd);
+#endif
+
 int rtw_init_netdev_name(struct net_device *pnetdev, const char *ifname);
 struct net_device *rtw_init_netdev(_adapter *padapter);
 
diff --git a/include/rtw_mlme.h b/include/rtw_mlme.h
index e3095a5..6d48fba 100644
--- a/include/rtw_mlme.h
+++ b/include/rtw_mlme.h
@@ -539,9 +539,9 @@ struct tdls_txmgmt {
 
 /* used for mlme_priv.roam_flags */
 enum {
-	RTW_ROAM_ON_EXPIRED = BIT0,
-	RTW_ROAM_ON_RESUME = BIT1,
-	RTW_ROAM_ACTIVE = BIT2,
+	RTW_ROAM_ON_EXPIRED = BIT0, /* roam when AP is expired */
+	RTW_ROAM_ON_RESUME = BIT1,  /* roam when device is resumed (after being suspended) */
+	RTW_ROAM_ACTIVE = BIT2,     /* active roam when current rssi (signal strength) is too low */
 };
 
 #define UNASOC_STA_SRC_RX_BMC		0
@@ -568,22 +568,22 @@ struct unassoc_sta_info {
 #endif
 
 struct mlme_priv {
-
 	_lock	lock;
 	sint	fw_state;	/* shall we protect this variable? maybe not necessarily... */
 	u8	to_join; /* flag */
 	u16 join_status;
 #ifdef CONFIG_LAYER2_ROAMING
-	u8 to_roam; /* roaming trying times */
+	u8 to_roam;				/* internal counter for #roaming scans */
 	struct wlan_network *roam_network; /* the target of active roam */
-	u8 roam_flags;
-	u8 roam_rssi_diff_th; /* rssi difference threshold for active scan candidate selection */
-	u32 roam_scan_int; 		/* scan interval for active roam (Unit:2 second)*/
-	u32 roam_scanr_exp_ms; /* scan result expire time in ms  for roam */
+	u8 roam_flags;			/* defines roam types - check enum above */
+	u8 roam_rssi_diff_th;	/* during network scan/survey: the rssi difference between the current network and
+							 * the candidate network must be above this threshold to withhold the candidate */
+	u32 roam_scan_int;		/* minimum interval (unit: 2 seconds) between roaming scans */
+	u32 roam_scanr_exp_ms;	/* expire time in ms: only withhold candidate if last seen within expire time */
 	u8 roam_tgt_addr[ETH_ALEN]; /* request to roam to speicific target without other consideration */
-	u8 roam_rssi_threshold;
-	systime last_roaming;
-	bool need_to_roam;
+	u8 roam_rssi_threshold; /* rssi (signal strength) must be below this threshold to start a roaming scan */
+	systime last_roaming;	/* time of start of last roaming scan */
+	bool need_to_roam;		/* flag to check if roaming is (still) necessary */
 #endif
 
 	u32 defs_lmt_sta;
diff --git a/os_dep/linux/ioctl_linux.c b/os_dep/linux/ioctl_linux.c
index 1c52acc..7d8d09c 100644
--- a/os_dep/linux/ioctl_linux.c
+++ b/os_dep/linux/ioctl_linux.c
@@ -13058,3 +13058,14 @@ int rtw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 
 	return ret;
 }
+
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)) && defined(CONFIG_MP_INCLUDED))
+int rtw_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+                       void __user *data, int cmd)
+{
+	if (cmd != SIOCDEVPRIVATE)
+		return -EOPNOTSUPP;
+
+	return rtw_ioctl_standard_wext_private(dev, ifr);
+}
+#endif
diff --git a/os_dep/linux/os_intfs.c b/os_dep/linux/os_intfs.c
index bb4e15d..2c07635 100644
--- a/os_dep/linux/os_intfs.c
+++ b/os_dep/linux/os_intfs.c
@@ -1849,6 +1849,9 @@ static const struct net_device_ops rtw_netdev_ops = {
 	.ndo_set_mac_address = rtw_net_set_mac_address,
 	.ndo_get_stats = rtw_net_get_stats,
 	.ndo_do_ioctl = rtw_ioctl,
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)) && defined(CONFIG_MP_INCLUDED))
+	.ndo_siocdevprivate = rtw_siocdevprivate,
+#endif
 };
 #endif
 
@@ -3347,6 +3350,9 @@ static const struct net_device_ops rtw_netdev_vir_if_ops = {
 	.ndo_set_mac_address = rtw_net_set_mac_address,
 	.ndo_get_stats = rtw_net_get_stats,
 	.ndo_do_ioctl = rtw_ioctl,
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)) && defined(CONFIG_MP_INCLUDED))
+	.ndo_siocdevprivate = rtw_siocdevprivate,
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
 	.ndo_select_queue	= rtw_select_queue,
 #endif