iwlwifi: mvm: check if scan can be started before cancelling other scans

If a new scan cannot be run for some reason, we shouldn't cancel other
ongoing scans.  Move the checks to before the code that cancels other
scans.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 15dc4a4..f57d584 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -2387,13 +2387,6 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
 
        mutex_lock(&mvm->mutex);
 
-       if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
-           (mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
-               ret = iwl_mvm_scan_offload_stop(mvm, true);
-               if (ret)
-                       goto out;
-       }
-
        if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
                IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
                ret = -EBUSY;
@@ -2405,6 +2398,13 @@ static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
                goto out;
        }
 
+       if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
+           (mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
+               ret = iwl_mvm_scan_offload_stop(mvm, true);
+               if (ret)
+                       goto out;
+       }
+
        iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
 
        if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
@@ -2758,13 +2758,6 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
 
        mutex_lock(&mvm->mutex);
 
-       if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
-           (mvm->scan_status & IWL_MVM_SCAN_REGULAR)) {
-               ret = iwl_mvm_cancel_scan(mvm);
-               if (ret)
-                       goto out;
-       }
-
        if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
                IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
                ret = -EBUSY;
@@ -2781,6 +2774,13 @@ static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
                goto out;
        }
 
+       if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
+           (mvm->scan_status & IWL_MVM_SCAN_REGULAR)) {
+               ret = iwl_mvm_cancel_scan(mvm);
+               if (ret)
+                       goto out;
+       }
+
        ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
        if (ret)
                mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;