Backmerge tag 'v4.9-rc8' into drm-next

Linux 4.9-rc8

Daniel requested this so we could apply some follow on fixes cleanly to -next.

1 files changed, 38 insertions, 11 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index 4fdc3dad3e85..b88e2048ae0b 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -1087,6 +1087,15 @@ iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 		ret = iwl_mvm_switch_to_d3(mvm);
 		if (ret)
 			return ret;
+	} else {
+		/* In theory, we wouldn't have to stop a running sched
+		 * scan in order to start another one (for
+		 * net-detect).  But in practice this doesn't seem to
+		 * work properly, so stop any running sched_scan now.
+		 */
+		ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
+		if (ret)
+			return ret;
 	}
 
 	/* rfkill release can be either for wowlan or netdetect */
@@ -1254,7 +1263,10 @@ static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
  out:
 	if (ret < 0) {
 		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
-		ieee80211_restart_hw(mvm->hw);
+		if (mvm->restart_fw > 0) {
+			mvm->restart_fw--;
+			ieee80211_restart_hw(mvm->hw);
+		}
 		iwl_mvm_free_nd(mvm);
 	}
  out_noreset:
@@ -2088,6 +2100,16 @@ static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
 	iwl_mvm_update_changed_regdom(mvm);
 
 	if (mvm->net_detect) {
+		/* If this is a non-unified image, we restart the FW,
+		 * so no need to stop the netdetect scan.  If that
+		 * fails, continue and try to get the wake-up reasons,
+		 * but trigger a HW restart by keeping a failure code
+		 * in ret.
+		 */
+		if (unified_image)
+			ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
+						false);
+
 		iwl_mvm_query_netdetect_reasons(mvm, vif);
 		/* has unlocked the mutex, so skip that */
 		goto out;
@@ -2271,7 +2293,8 @@ static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
 {
 	struct iwl_mvm *mvm = inode->i_private;
-	int remaining_time = 10;
+	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
+					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 
 	mvm->d3_test_active = false;
 
@@ -2282,17 +2305,21 @@ static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
 	mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
 
 	iwl_abort_notification_waits(&mvm->notif_wait);
-	ieee80211_restart_hw(mvm->hw);
+	if (!unified_image) {
+		int remaining_time = 10;
 
-	/* wait for restart and disconnect all interfaces */
-	while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
-	       remaining_time > 0) {
-		remaining_time--;
-		msleep(1000);
-	}
+		ieee80211_restart_hw(mvm->hw);
+
+		/* wait for restart and disconnect all interfaces */
+		while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
+		       remaining_time > 0) {
+			remaining_time--;
+			msleep(1000);
+		}
 
-	if (remaining_time == 0)
-		IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
+		if (remaining_time == 0)
+			IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
+	}
 
 	ieee80211_iterate_active_interfaces_atomic(
 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,