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-rw-r--r--net/mac80211/iface.c26
-rw-r--r--net/mac80211/scan.c9
2 files changed, 8 insertions, 27 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index d134bd79972..f6005adcbf9 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -497,30 +497,8 @@ static int ieee80211_stop(struct net_device *dev)
}
/* fall through */
default:
- if (local->scan_sdata == sdata) {
- if (!local->ops->hw_scan)
- cancel_delayed_work_sync(&local->scan_work);
- /*
- * The software scan can no longer run now, so we can
- * clear out the scan_sdata reference. However, the
- * hardware scan may still be running. The complete
- * function must be prepared to handle a NULL value.
- */
- local->scan_sdata = NULL;
- /*
- * The memory barrier guarantees that another CPU
- * that is hardware-scanning will now see the fact
- * that this interface is gone.
- */
- smp_mb();
- /*
- * If software scanning, complete the scan but since
- * the scan_sdata is NULL already don't send out a
- * scan event to userspace -- the scan is incomplete.
- */
- if (test_bit(SCAN_SW_SCANNING, &local->scanning))
- ieee80211_scan_completed(&local->hw, true);
- }
+ if (local->scan_sdata == sdata)
+ ieee80211_scan_cancel(local);
/*
* Disable beaconing for AP and mesh, IBSS can't
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 1e04be6b912..039901109fa 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -280,6 +280,7 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
if (local->scan_req != local->int_scan_req)
cfg80211_scan_done(local->scan_req, aborted);
local->scan_req = NULL;
+ local->scan_sdata = NULL;
was_hw_scan = test_bit(SCAN_HW_SCANNING, &local->scanning);
local->scanning = 0;
@@ -660,6 +661,7 @@ void ieee80211_scan_work(struct work_struct *work)
int rc;
local->scan_req = NULL;
+ local->scan_sdata = NULL;
rc = __ieee80211_start_scan(sdata, req);
mutex_unlock(&local->scan_mtx);
@@ -742,7 +744,7 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
void ieee80211_scan_cancel(struct ieee80211_local *local)
{
- bool swscan;
+ bool abortscan;
cancel_delayed_work_sync(&local->scan_work);
@@ -751,9 +753,10 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
* queued -- mostly at suspend under RTNL.
*/
mutex_lock(&local->scan_mtx);
- swscan = test_bit(SCAN_SW_SCANNING, &local->scanning);
+ abortscan = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ (!local->scanning && local->scan_req);
mutex_unlock(&local->scan_mtx);
- if (swscan)
+ if (abortscan)
ieee80211_scan_completed(&local->hw, true);
}