wifi: iwlwifi: mvm: add mvm-specific guard

Add and use an mvm-specific guard for the mvm mutex.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240512152312.7391425b3af2.I1b109f56753dd3f35602dd2c5cf6e1e35aee313d@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c

@@ -12,7 +12,7 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
 	int ret;
 	int i;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	iwl_mvm_mac_init_mvmvif(mvm, mvmvif);
 
@@ -32,7 +32,7 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
 	/* Allocate resources for the MAC context, and add it to the fw  */
 	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	rcu_assign_pointer(mvm->vif_id_to_mac[mvmvif->id], vif);
 
@@ -46,7 +46,7 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
 
 	ret = iwl_mvm_mld_mac_ctxt_add(mvm, vif);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* beacon filtering */
 	ret = iwl_mvm_disable_beacon_filter(mvm, vif);
@@ -97,7 +97,7 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
 	if (vif->p2p || iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1) < 5)
 		vif->driver_flags |= IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW;
 
-	goto out_unlock;
+	return 0;
 
  out_free_bf:
 	if (mvm->bf_allowed_vif == mvmvif) {
@@ -108,9 +108,6 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
  out_remove_mac:
 	mvmvif->link[0] = NULL;
 	iwl_mvm_mld_mac_ctxt_remove(mvm, vif);
- out_unlock:
-	mutex_unlock(&mvm->mutex);
-
 	return ret;
 }
 
@@ -127,7 +124,7 @@ static void iwl_mvm_mld_mac_remove_interface(struct ieee80211_hw *hw,
 	      vif->type == NL80211_IFTYPE_ADHOC))
 		iwl_mvm_tcm_rm_vif(mvm, vif);
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (vif == mvm->csme_vif) {
 		iwl_mei_set_netdev(NULL);
@@ -190,8 +187,6 @@ static void iwl_mvm_mld_mac_remove_interface(struct ieee80211_hw *hw,
 		mvm->monitor_on = false;
 		__clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
 	}
-
-	mutex_unlock(&mvm->mutex);
 }
 
 static unsigned int iwl_mvm_mld_count_active_links(struct iwl_mvm_vif *mvmvif)
@@ -389,10 +384,11 @@ static int iwl_mvm_mld_assign_vif_chanctx(struct ieee80211_hw *hw,
 					  struct ieee80211_chanctx_conf *ctx)
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	int ret;
 
 	/* update EMLSR mode */
 	if (ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_STATION) {
+		int ret;
+
 		ret = iwl_mvm_esr_non_bss_link(mvm, vif, link_conf->link_id,
 					       true);
 		/*
@@ -403,11 +399,8 @@ static int iwl_mvm_mld_assign_vif_chanctx(struct ieee80211_hw *hw,
 			return ret;
 	}
 
-	mutex_lock(&mvm->mutex);
-	ret = __iwl_mvm_mld_assign_vif_chanctx(mvm, vif, link_conf, ctx, false);
-	mutex_unlock(&mvm->mutex);
-
-	return ret;
+	guard(mvm)(mvm);
+	return __iwl_mvm_mld_assign_vif_chanctx(mvm, vif, link_conf, ctx, false);
 }
 
 static int iwl_mvm_esr_mode_inactive(struct iwl_mvm *mvm,
@@ -586,7 +579,7 @@ static int iwl_mvm_mld_start_ap_ibss(struct ieee80211_hw *hw,
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	int ret;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (vif->type == NL80211_IFTYPE_AP)
 		iwl_mvm_send_ap_tx_power_constraint_cmd(mvm, vif, link_conf);
@@ -594,7 +587,7 @@ static int iwl_mvm_mld_start_ap_ibss(struct ieee80211_hw *hw,
 	/* Send the beacon template */
 	ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif, link_conf);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* the link should be already activated when assigning chan context */
 	ret = iwl_mvm_link_changed(mvm, vif, link_conf,
@@ -602,11 +595,11 @@ static int iwl_mvm_mld_start_ap_ibss(struct ieee80211_hw *hw,
 				   ~LINK_CONTEXT_MODIFY_ACTIVE,
 				   true);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	ret = iwl_mvm_mld_add_mcast_sta(mvm, vif, link_conf);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	/* Send the bcast station. At this stage the TBTT and DTIM time
 	 * events are added and applied to the scheduler
@@ -630,7 +623,7 @@ static int iwl_mvm_mld_start_ap_ibss(struct ieee80211_hw *hw,
 
 	iwl_mvm_ftm_restart_responder(mvm, vif, link_conf);
 
-	goto out_unlock;
+	return 0;
 
 out_failed:
 	iwl_mvm_power_update_mac(mvm);
@@ -638,8 +631,6 @@ static int iwl_mvm_mld_start_ap_ibss(struct ieee80211_hw *hw,
 	iwl_mvm_mld_rm_bcast_sta(mvm, vif, link_conf);
 out_rm_mcast:
 	iwl_mvm_mld_rm_mcast_sta(mvm, vif, link_conf);
-out_unlock:
-	mutex_unlock(&mvm->mutex);
 	return ret;
 }
 
@@ -662,7 +653,7 @@ static void iwl_mvm_mld_stop_ap_ibss(struct ieee80211_hw *hw,
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	iwl_mvm_stop_ap_ibss_common(mvm, vif);
 
@@ -676,7 +667,6 @@ static void iwl_mvm_mld_stop_ap_ibss(struct ieee80211_hw *hw,
 	iwl_mvm_mld_rm_mcast_sta(mvm, vif, link_conf);
 
 	iwl_mvm_power_update_mac(mvm);
-	mutex_unlock(&mvm->mutex);
 }
 
 static void iwl_mvm_mld_stop_ap(struct ieee80211_hw *hw,
@@ -979,7 +969,7 @@ static void iwl_mvm_mld_link_info_changed(struct ieee80211_hw *hw,
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
@@ -1005,8 +995,6 @@ static void iwl_mvm_mld_link_info_changed(struct ieee80211_hw *hw,
 				link_conf->txpower);
 		iwl_mvm_set_tx_power(mvm, vif, link_conf->txpower);
 	}
-
-	mutex_unlock(&mvm->mutex);
 }
 
 static void iwl_mvm_mld_vif_cfg_changed(struct ieee80211_hw *hw,
@@ -1015,15 +1003,13 @@ static void iwl_mvm_mld_vif_cfg_changed(struct ieee80211_hw *hw,
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (changes & BSS_CHANGED_IDLE && !vif->cfg.idle)
 		iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
 
 	if (vif->type == NL80211_IFTYPE_STATION)
 		iwl_mvm_mld_vif_cfg_changed_station(mvm, vif, changes);
-
-	mutex_unlock(&mvm->mutex);
 }
 
 static int
@@ -1056,9 +1042,8 @@ static void iwl_mvm_mld_config_iface_filter(struct ieee80211_hw *hw,
 	    !vif->p2p)
 		return;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 	iwl_mvm_mld_mac_ctxt_changed(mvm, vif, false);
-	mutex_unlock(&mvm->mutex);
 }
 
 static int
@@ -1080,14 +1065,10 @@ iwl_mvm_mld_mac_conf_tx(struct ieee80211_hw *hw,
 	 * The exception is P2P_DEVICE interface which needs immediate update.
 	 */
 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
-		int ret;
-
-		mutex_lock(&mvm->mutex);
-		ret = iwl_mvm_link_changed(mvm, vif, &vif->bss_conf,
+		guard(mvm)(mvm);
+		return iwl_mvm_link_changed(mvm, vif, &vif->bss_conf,
 					    LINK_CONTEXT_MODIFY_QOS_PARAMS,
 					    true);
-		mutex_unlock(&mvm->mutex);
-		return ret;
 	}
 	return 0;
 }
@@ -1232,13 +1213,9 @@ iwl_mvm_mld_change_sta_links(struct ieee80211_hw *hw,
 			     u16 old_links, u16 new_links)
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	int ret;
-
-	mutex_lock(&mvm->mutex);
-	ret = iwl_mvm_mld_update_sta_links(mvm, vif, sta, old_links, new_links);
-	mutex_unlock(&mvm->mutex);
 
-	return ret;
+	guard(mvm)(mvm);
+	return iwl_mvm_mld_update_sta_links(mvm, vif, sta, old_links, new_links);
 }
 
 bool iwl_mvm_vif_has_esr_cap(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
@@ -1266,26 +1243,19 @@ static bool iwl_mvm_mld_can_activate_links(struct ieee80211_hw *hw,
 {
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 	int n_links = hweight16(desired_links);
-	bool ret = true;
 
 	if (n_links <= 1)
 		return true;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	/* Check if HW supports the wanted number of links */
-	if (n_links > iwl_mvm_max_active_links(mvm, vif)) {
-		ret = false;
-		goto unlock;
-	}
+	if (n_links > iwl_mvm_max_active_links(mvm, vif))
+		return false;
 
 	/* If it is an eSR device, check that we can enter eSR */
-	ret = iwl_mvm_is_esr_supported(mvm->fwrt.trans) &&
+	return iwl_mvm_is_esr_supported(mvm->fwrt.trans) &&
 	       iwl_mvm_vif_has_esr_cap(mvm, vif);
-
-unlock:
-	mutex_unlock(&mvm->mutex);
-	return ret;
 }
 
 static enum ieee80211_neg_ttlm_res

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -9,6 +9,7 @@
 
 #include <linux/list.h>
 #include <linux/spinlock.h>
+#include <linux/cleanup.h>
 #include <linux/leds.h>
 #include <linux/in6.h>
 
@@ -1332,6 +1333,8 @@ struct iwl_mvm {
 #define IWL_MAC80211_GET_MVM(_hw)			\
 	IWL_OP_MODE_GET_MVM((struct iwl_op_mode *)((_hw)->priv))
 
+DEFINE_GUARD(mvm, struct iwl_mvm *, mutex_lock(&_T->mutex), mutex_unlock(&_T->mutex))
+
 /**
  * enum iwl_mvm_status - MVM status bits
  * @IWL_MVM_STATUS_HW_RFKILL: HW RF-kill is asserted

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -765,20 +765,18 @@ static void iwl_mvm_tx_unblock_dwork(struct work_struct *work)
 	struct ieee80211_vif *tx_blocked_vif;
 	struct iwl_mvm_vif *mvmvif;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	tx_blocked_vif =
 		rcu_dereference_protected(mvm->csa_tx_blocked_vif,
 					  lockdep_is_held(&mvm->mutex));
 
 	if (!tx_blocked_vif)
-		goto unlock;
+		return;
 
 	mvmvif = iwl_mvm_vif_from_mac80211(tx_blocked_vif);
 	iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
 	RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
-unlock:
-	mutex_unlock(&mvm->mutex);
 }
 
 static void iwl_mvm_fwrt_dump_start(void *ctx)
@@ -798,13 +796,9 @@ static void iwl_mvm_fwrt_dump_end(void *ctx)
 static int iwl_mvm_fwrt_send_hcmd(void *ctx, struct iwl_host_cmd *host_cmd)
 {
 	struct iwl_mvm *mvm = (struct iwl_mvm *)ctx;
-	int ret;
 
-	mutex_lock(&mvm->mutex);
-	ret = iwl_mvm_send_cmd(mvm, host_cmd);
-	mutex_unlock(&mvm->mutex);
-
-	return ret;
+	guard(mvm)(mvm);
+	return iwl_mvm_send_cmd(mvm, host_cmd);
 }
 
 static bool iwl_mvm_d3_debug_enable(void *ctx)

drivers/net/wireless/intel/iwlwifi/mvm/tdls.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2014 Intel Mobile Communications GmbH
  * Copyright (C) 2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2020, 2022-2023 Intel Corporation
+ * Copyright (C) 2018-2020, 2022-2024 Intel Corporation
  */
 #include <linux/etherdevice.h>
 #include "mvm.h"
@@ -151,7 +151,7 @@ void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
 	u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
 
 	/* Protect the session to hear the TDLS setup response on the channel */
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 	if (fw_has_capa(&mvm->fw->ucode_capa,
 			IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD))
 		iwl_mvm_schedule_session_protection(mvm, vif, duration,
@@ -159,7 +159,6 @@ void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
 	else
 		iwl_mvm_protect_session(mvm, vif, duration,
 					duration, 100, true);
-	mutex_unlock(&mvm->mutex);
 }
 
 static const char *
@@ -460,21 +459,21 @@ void iwl_mvm_tdls_ch_switch_work(struct work_struct *work)
 	int ret;
 
 	mvm = container_of(work, struct iwl_mvm, tdls_cs.dwork.work);
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	/* called after an active channel switch has finished or timed-out */
 	iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE);
 
 	/* station might be gone, in that case do nothing */
 	if (mvm->tdls_cs.peer.sta_id == IWL_MVM_INVALID_STA)
-		goto out;
+		return;
 
 	sta = rcu_dereference_protected(
 				mvm->fw_id_to_mac_id[mvm->tdls_cs.peer.sta_id],
 				lockdep_is_held(&mvm->mutex));
 	/* the station may not be here, but if it is, it must be a TDLS peer */
 	if (!sta || IS_ERR(sta) || WARN_ON(!sta->tdls))
-		goto out;
+		return;
 
 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	vif = mvmsta->vif;
@@ -493,8 +492,6 @@ void iwl_mvm_tdls_ch_switch_work(struct work_struct *work)
 	/* retry after a DTIM if we failed sending now */
 	delay = TU_TO_MS(vif->bss_conf.dtim_period * vif->bss_conf.beacon_int);
 	schedule_delayed_work(&mvm->tdls_cs.dwork, msecs_to_jiffies(delay));
-out:
-	mutex_unlock(&mvm->mutex);
 }
 
 int
@@ -509,7 +506,7 @@ iwl_mvm_tdls_channel_switch(struct ieee80211_hw *hw,
 	unsigned int delay;
 	int ret;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	IWL_DEBUG_TDLS(mvm, "TDLS channel switch with %pM ch %d width %d\n",
 		       sta->addr, chandef->chan->center_freq, chandef->width);
@@ -519,8 +516,7 @@ iwl_mvm_tdls_channel_switch(struct ieee80211_hw *hw,
 		IWL_DEBUG_TDLS(mvm,
 			       "Existing peer. Can't start switch with %pM\n",
 			       sta->addr);
-		ret = -EBUSY;
-		goto out;
+		return -EBUSY;
 	}
 
 	ret = iwl_mvm_tdls_config_channel_switch(mvm, vif,
@@ -529,17 +525,15 @@ iwl_mvm_tdls_channel_switch(struct ieee80211_hw *hw,
 						 oper_class, chandef, 0, 0, 0,
 						 tmpl_skb, ch_sw_tm_ie);
 	if (ret)
-		goto out;
+		return ret;
 
 	/*
 	 * Mark the peer as "in tdls switch" for this vif. We only allow a
 	 * single such peer per vif.
 	 */
 	mvm->tdls_cs.peer.skb = skb_copy(tmpl_skb, GFP_KERNEL);
-	if (!mvm->tdls_cs.peer.skb) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!mvm->tdls_cs.peer.skb)
+		return -ENOMEM;
 
 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	mvm->tdls_cs.peer.sta_id = mvmsta->deflink.sta_id;
@@ -556,10 +550,7 @@ iwl_mvm_tdls_channel_switch(struct ieee80211_hw *hw,
 			     vif->bss_conf.beacon_int);
 	mod_delayed_work(system_wq, &mvm->tdls_cs.dwork,
 			 msecs_to_jiffies(delay));
-
-out:
-	mutex_unlock(&mvm->mutex);
-	return ret;
+	return 0;
 }
 
 void iwl_mvm_tdls_cancel_channel_switch(struct ieee80211_hw *hw,
@@ -626,7 +617,7 @@ iwl_mvm_tdls_recv_channel_switch(struct ieee80211_hw *hw,
 		params->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ?
 		"REQ" : "RESP";
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	IWL_DEBUG_TDLS(mvm,
 		       "Received TDLS ch switch action %s from %pM status %d\n",
@@ -670,5 +661,4 @@ iwl_mvm_tdls_recv_channel_switch(struct ieee80211_hw *hw,
 		1024 / 1000;
 	mod_delayed_work(system_wq, &mvm->tdls_cs.dwork,
 			 msecs_to_jiffies(delay));
-	mutex_unlock(&mvm->mutex);
 }

drivers/net/wireless/intel/iwlwifi/mvm/tt.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2012-2014, 2019-2022 Intel Corporation
+ * Copyright (C) 2012-2014, 2019-2022, 2024 Intel Corporation
  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
  * Copyright (C) 2015-2016 Intel Deutschland GmbH
  */
@@ -618,48 +618,35 @@ static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
 	int ret;
 	int temp;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (!iwl_mvm_firmware_running(mvm) ||
-	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
-		ret = -ENODATA;
-		goto out;
-	}
+	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
+		return -ENODATA;
 
 	ret = iwl_mvm_get_temp(mvm, &temp);
 	if (ret)
-		goto out;
+		return ret;
 
 	*temperature = temp * 1000;
-
-out:
-	mutex_unlock(&mvm->mutex);
-	return ret;
+	return 0;
 }
 
 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
 				       int trip, int temp)
 {
 	struct iwl_mvm *mvm = thermal_zone_device_priv(device);
-	int ret;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (!iwl_mvm_firmware_running(mvm) ||
-	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
-		ret = -EIO;
-		goto out;
-	}
+	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
+		return -EIO;
 
-	if ((temp / 1000) > S16_MAX) {
-		ret = -EINVAL;
-		goto out;
-	}
+	if ((temp / 1000) > S16_MAX)
+		return -EINVAL;
 
-	ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
-out:
-	mutex_unlock(&mvm->mutex);
-	return ret;
+	return iwl_mvm_send_temp_report_ths_cmd(mvm);
 }
 
 static  struct thermal_zone_device_ops tzone_ops = {
@@ -733,27 +720,18 @@ static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
 				       unsigned long new_state)
 {
 	struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
-	int ret;
 
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	if (!iwl_mvm_firmware_running(mvm) ||
-	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
-		ret = -EIO;
-		goto unlock;
-	}
+	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
+		return -EIO;
 
-	if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
-		ret = -EINVAL;
-		goto unlock;
-	}
+	if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets))
+		return -EINVAL;
 
-	ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
+	return iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
 				    new_state);
-
-unlock:
-	mutex_unlock(&mvm->mutex);
-	return ret;
 }
 
 static const struct thermal_cooling_device_ops tcooling_ops = {

drivers/net/wireless/intel/iwlwifi/mvm/utils.c

@@ -892,7 +892,7 @@ static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
 
 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
 {
-	mutex_lock(&mvm->mutex);
+	guard(mvm)(mvm);
 
 	ieee80211_iterate_active_interfaces(
 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
@@ -900,8 +900,6 @@ static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
 
 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 		iwl_mvm_config_scan(mvm);
-
-	mutex_unlock(&mvm->mutex);
 }
 
 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
@@ -1130,10 +1128,9 @@ void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
 	spin_unlock(&mvm->tcm.lock);
 
 	if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
-		mutex_lock(&mvm->mutex);
+		guard(mvm)(mvm);
 		if (iwl_mvm_request_statistics(mvm, true))
 			handle_uapsd = false;
-		mutex_unlock(&mvm->mutex);
 	}
 
 	spin_lock(&mvm->tcm.lock);