6 files changed, 29 insertions, 32 deletions

diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index 116f4aba08d6..32f75007a825 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1268,14 +1268,9 @@ static struct cfg80211_scan_request *
 _new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme)
 {
         struct cfg80211_scan_request *creq = NULL;
-        int i, n_channels = 0;
+        int i, n_channels = ieee80211_get_num_supported_channels(wiphy);
         enum ieee80211_band band;
 
-        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-                if (wiphy->bands[band])
-                        n_channels += wiphy->bands[band]->n_channels;
-        }
-
         creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
                        n_channels * sizeof(void *),
                        GFP_ATOMIC);
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 56c597793d6d..b1f84b05c67e 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4640,6 +4640,14 @@ void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
  */
 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp);
 
+/**
+ * ieee80211_get_num_supported_channels - get number of channels device has
+ * @wiphy: the wiphy
+ *
+ * Return: the number of channels supported by the device.
+ */
+unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy);
+
 /* Logging, debugging and troubleshooting/diagnostic helpers. */
 
 /* wiphy_printk helpers, similar to dev_printk */
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 20857126f742..d0afd82ebd77 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5285,12 +5285,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
                         goto unlock;
                 }
         } else {
-                enum ieee80211_band band;
-                n_channels = 0;
-
-                for (band = 0; band < IEEE80211_NUM_BANDS; band++)
-                        if (wiphy->bands[band])
-                                n_channels += wiphy->bands[band]->n_channels;
+                n_channels = ieee80211_get_num_supported_channels(wiphy);
         }
 
         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
@@ -5498,11 +5493,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
                 if (!n_channels)
                         return -EINVAL;
         } else {
-                n_channels = 0;
-
-                for (band = 0; band < IEEE80211_NUM_BANDS; band++)
-                        if (wiphy->bands[band])
-                                n_channels += wiphy->bands[band]->n_channels;
+                n_channels = ieee80211_get_num_supported_channels(wiphy);
         }
 
         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index a32d52a04c27..b528e31da2cf 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1089,11 +1089,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
         /* Determine number of channels, needed to allocate creq */
         if (wreq && wreq->num_channels)
                 n_channels = wreq->num_channels;
-        else {
-                for (band = 0; band < IEEE80211_NUM_BANDS; band++)
-                        if (wiphy->bands[band])
-                                n_channels += wiphy->bands[band]->n_channels;
-        }
+        else
+                n_channels = ieee80211_get_num_supported_channels(wiphy);
 
         creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
                        n_channels * sizeof(void *),
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 3f64202358f4..c854f1ce22db 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -70,18 +70,11 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
         if (rdev->scan_req)
                 return -EBUSY;
 
-        if (wdev->conn->params.channel) {
+        if (wdev->conn->params.channel)
                 n_channels = 1;
-        } else {
-                enum ieee80211_band band;
-                n_channels = 0;
+        else
+                n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
 
-                for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
-                        if (!wdev->wiphy->bands[band])
-                                continue;
-                        n_channels += wdev->wiphy->bands[band]->n_channels;
-                }
-        }
         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
                           sizeof(request->channels[0]) * n_channels,
                           GFP_KERNEL);
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 329b0efb3ded..d39c37104ae2 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1481,6 +1481,19 @@ int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
         return 0;
 }
 
+unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
+{
+        enum ieee80211_band band;
+        unsigned int n_channels = 0;
+
+        for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+                if (wiphy->bands[band])
+                        n_channels += wiphy->bands[band]->n_channels;
+
+        return n_channels;
+}
+EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
+
 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 const unsigned char rfc1042_header[] __aligned(2) =