From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 30 Dec 2024 19:41:58 +0000 (+0100)
Subject: wifi: mt76: mt7915: hold dev->mutex while interacting with the thermal state
X-Git-Tag: v6.14-rc1~162^2~20^2~4^2~44
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e733647566ecbf7a261e583f49320855f0c33221;p=thirdparty%2Fkernel%2Flinux.git

wifi: mt76: mt7915: hold dev->mutex while interacting with the thermal state

Avoid issuing MCU calls during a hardware restart

Link: https://patch.msgid.link/20241230194202.95065-10-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 4282857d8ce90..c530435b19b59 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -53,7 +53,9 @@ static ssize_t mt7915_thermal_temp_show(struct device *dev,
 
 	switch (i) {
 	case 0:
+		mutex_lock(&phy->dev->mt76.mutex);
 		temperature = mt7915_mcu_get_temperature(phy);
+		mutex_unlock(&phy->dev->mt76.mutex);
 		if (temperature < 0)
 			return temperature;
 		/* display in millidegree celcius */
@@ -95,9 +97,8 @@ static ssize_t mt7915_thermal_temp_store(struct device *dev,
 	}
 
 	phy->throttle_temp[i - 1] = val;
-	mutex_unlock(&phy->dev->mt76.mutex);
-
 	ret = mt7915_mcu_set_thermal_protect(phy);
+	mutex_unlock(&phy->dev->mt76.mutex);
 	if (ret)
 		return ret;
 
@@ -159,7 +160,9 @@ mt7915_thermal_set_cur_throttle_state(struct thermal_cooling_device *cdev,
 	 * cooling_device convention: 0 = no cooling, more = more cooling
 	 * mcu convention: 1 = max cooling, more = less cooling
 	 */
+	mutex_lock(&phy->dev->mt76.mutex);
 	ret = mt7915_mcu_set_thermal_throttling(phy, throttling);
+	mutex_unlock(&phy->dev->mt76.mutex);
 	if (ret)
 		return ret;