1 files changed, 12 insertions, 20 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7a742594916e..4fe2e6e2bc76 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1719,9 +1719,10 @@ static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
                                  * We can then retry with the larger buffer.
                                  */
                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
-                                    !skb->len &&
+                                    !skb->len && !state->split &&
                                     cb->min_dump_alloc < 4096) {
                                         cb->min_dump_alloc = 4096;
+                                        state->split_start = 0;
                                         rtnl_unlock();
                                         return 1;
                                 }
@@ -5244,7 +5245,7 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
         if (!rdev->ops->scan)
                 return -EOPNOTSUPP;
 
-        if (rdev->scan_req) {
+        if (rdev->scan_req || rdev->scan_msg) {
                 err = -EBUSY;
                 goto unlock;
         }
@@ -10011,40 +10012,31 @@ void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
 }
 
-void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
-                            struct wireless_dev *wdev)
+struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
+                                       struct wireless_dev *wdev, bool aborted)
 {
         struct sk_buff *msg;
 
         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
         if (!msg)
-                return;
+                return NULL;
 
         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
-                                  NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
+                                  aborted ? NL80211_CMD_SCAN_ABORTED :
+                                            NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
                 nlmsg_free(msg);
-                return;
+                return NULL;
         }
 
-        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
-                                NL80211_MCGRP_SCAN, GFP_KERNEL);
+        return msg;
 }
 
-void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
-                               struct wireless_dev *wdev)
+void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
+                              struct sk_buff *msg)
 {
-        struct sk_buff *msg;
-
-        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
         if (!msg)
                 return;
 
-        if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
-                                  NL80211_CMD_SCAN_ABORTED) < 0) {
-                nlmsg_free(msg);
-                return;
-        }
-
         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
 }