1 files changed, 56 insertions, 11 deletions

diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index 0a423c49aab9..8a77ff68590b 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -156,6 +156,12 @@ MODULE_PARM_DESC(workaround_interval,
 #define RNDIS_STATUS_ADAPTER_NOT_OPEN		cpu_to_le32(0xc0010012)
 
 
+/* Known device types */
+#define RNDIS_UNKNOWN	0
+#define RNDIS_BCM4320A	1
+#define RNDIS_BCM4320B	2
+
+
 /* NDIS data structures. Taken from wpa_supplicant driver_ndis.c
  * slightly modified for datatype endianess, etc
  */
@@ -478,6 +484,7 @@ struct rndis_wlan_private {
 	struct ieee80211_rate rates[ARRAY_SIZE(rndis_rates)];
 	u32 cipher_suites[ARRAY_SIZE(rndis_cipher_suites)];
 
+	int device_type;
 	int caps;
 	int multicast_size;
 
@@ -997,6 +1004,16 @@ static void restore_keys(struct usbnet *usbdev);
 static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid,
 					bool *matched);
 
+static int rndis_start_bssid_list_scan(struct usbnet *usbdev)
+{
+	__le32 tmp;
+
+	/* Note: OID_802_11_BSSID_LIST_SCAN clears internal BSS list. */
+	tmp = cpu_to_le32(1);
+	return rndis_set_oid(usbdev, OID_802_11_BSSID_LIST_SCAN, &tmp,
+							sizeof(tmp));
+}
+
 static int set_essid(struct usbnet *usbdev, struct ndis_80211_ssid *ssid)
 {
 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
@@ -1905,7 +1922,7 @@ static int rndis_scan(struct wiphy *wiphy, struct net_device *dev,
 	struct usbnet *usbdev = netdev_priv(dev);
 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
 	int ret;
-	__le32 tmp;
+	int delay = SCAN_DELAY_JIFFIES;
 
 	netdev_dbg(usbdev->net, "cfg80211.scan\n");
 
@@ -1922,13 +1939,13 @@ static int rndis_scan(struct wiphy *wiphy, struct net_device *dev,
 
 	priv->scan_request = request;
 
-	tmp = cpu_to_le32(1);
-	ret = rndis_set_oid(usbdev, OID_802_11_BSSID_LIST_SCAN, &tmp,
-							sizeof(tmp));
+	ret = rndis_start_bssid_list_scan(usbdev);
 	if (ret == 0) {
+		if (priv->device_type == RNDIS_BCM4320A)
+			delay = HZ;
+
 		/* Wait before retrieving scan results from device */
-		queue_delayed_work(priv->workqueue, &priv->scan_work,
-			SCAN_DELAY_JIFFIES);
+		queue_delayed_work(priv->workqueue, &priv->scan_work, delay);
 	}
 
 	return ret;
@@ -3046,8 +3063,21 @@ static void rndis_device_poller(struct work_struct *work)
 	 * also polls device with rndis_command() and catches for media link
 	 * indications.
 	 */
-	if (!is_associated(usbdev))
+	if (!is_associated(usbdev)) {
+		/* Workaround bad scanning in BCM4320a devices with active
+		 * background scanning when not associated.
+		 */
+		if (priv->device_type == RNDIS_BCM4320A && priv->radio_on &&
+		    !priv->scan_request) {
+			/* Get previous scan results */
+			rndis_check_bssid_list(usbdev, NULL, NULL);
+
+			/* Initiate new scan */
+			rndis_start_bssid_list_scan(usbdev);
+		}
+
 		goto end;
+	}
 
 	len = sizeof(rssi);
 	ret = rndis_query_oid(usbdev, OID_802_11_RSSI, &rssi, &len);
@@ -3104,10 +3134,12 @@ end:
 /*
  * driver/device initialization
  */
-static void rndis_copy_module_params(struct usbnet *usbdev)
+static void rndis_copy_module_params(struct usbnet *usbdev, int device_type)
 {
 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
 
+	priv->device_type = device_type;
+
 	priv->param_country[0] = modparam_country[0];
 	priv->param_country[1] = modparam_country[1];
 	priv->param_country[2] = 0;
@@ -3150,12 +3182,25 @@ static void rndis_copy_module_params(struct usbnet *usbdev)
 		priv->param_workaround_interval = modparam_workaround_interval;
 }
 
+static int unknown_early_init(struct usbnet *usbdev)
+{
+	/* copy module parameters for unknown so that iwconfig reports txpower
+	 * and workaround parameter is copied to private structure correctly.
+	 */
+	rndis_copy_module_params(usbdev, RNDIS_UNKNOWN);
+
+	/* This is unknown device, so do not try set configuration parameters.
+	 */
+
+	return 0;
+}
+
 static int bcm4320a_early_init(struct usbnet *usbdev)
 {
 	/* copy module parameters for bcm4320a so that iwconfig reports txpower
 	 * and workaround parameter is copied to private structure correctly.
 	 */
-	rndis_copy_module_params(usbdev);
+	rndis_copy_module_params(usbdev, RNDIS_BCM4320A);
 
 	/* bcm4320a doesn't handle configuration parameters well. Try
 	 * set any and you get partially zeroed mac and broken device.
@@ -3169,7 +3214,7 @@ static int bcm4320b_early_init(struct usbnet *usbdev)
 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
 	char buf[8];
 
-	rndis_copy_module_params(usbdev);
+	rndis_copy_module_params(usbdev, RNDIS_BCM4320B);
 
 	/* Early initialization settings, setting these won't have effect
 	 * if called after generic_rndis_bind().
@@ -3432,7 +3477,7 @@ static const struct driver_info rndis_wlan_info = {
 	.tx_fixup =	rndis_tx_fixup,
 	.reset =	rndis_wlan_reset,
 	.stop =		rndis_wlan_stop,
-	.early_init =	bcm4320a_early_init,
+	.early_init =	unknown_early_init,
 	.indication =	rndis_wlan_indication,
 };