iwlwifi: mvm: scan: fix scheduled scan restart handling

When restarting firmware with an ongoing scheduled scan, we
don't (and shouldn't) mark it as aborted as mac80211 will be
restarting it, and so no event should go out to userspace.
The appropriate comment regarding this wasn't moved to this
place, so add it.

However, we _do_ need to clean up our internal state, since
mac80211 will restart the scan, and we'll otherwise get to
the WARN_ON() a few lines below for no reason whatsoever.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210117130510.4ddc9b017268.Ie869b628ae56a5d776eba0e7b7f05f42fc566f2e@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
index 97d2de8..e89f4f1 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -2858,8 +2858,13 @@ void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
                        mvm->scan_uid_status[uid] = 0;
                }
                uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
-               if (uid >= 0 && !mvm->fw_restart) {
-                       ieee80211_sched_scan_stopped(mvm->hw);
+               if (uid >= 0) {
+                       /* Sched scan will be restarted by mac80211 in
+                        * restart_hw, so do not report if FW is about to be
+                        * restarted.
+                        */
+                       if (!mvm->fw_restart)
+                               ieee80211_sched_scan_stopped(mvm->hw);
                        mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
                        mvm->scan_uid_status[uid] = 0;
                }