powerpc/powernv: Fix endian issues with OPAL async code

Index: b/arch/powerpc/include/asm/opal.h
===================================================================
@@ -421,6 +421,12 @@ enum OpalSysparamPerm {
 	OPAL_SYSPARAM_RW        = (OPAL_SYSPARAM_READ | OPAL_SYSPARAM_WRITE),
 };
 
+struct raw_opal_msg {
+	__be32 msg_type;
+	__be32 reserved;
+	__be64 params[8];
+};
+
 struct opal_msg {
 	uint32_t msg_type;
 	uint32_t reserved;

Index: b/arch/powerpc/platforms/powernv/opal.c
===================================================================
@@ -288,9 +288,11 @@ static void opal_handle_message(void)
 	 * TODO: pre-allocate a message buffer depending on opal-msg-size
 	 * value in /proc/device-tree.
 	 */
+	static struct raw_opal_msg raw_msg;
 	static struct opal_msg msg;
+	int i;
 
-	ret = opal_get_msg(__pa(&msg), sizeof(msg));
+	ret = opal_get_msg(__pa(&raw_msg), sizeof(raw_msg));
 	/* No opal message pending. */
 	if (ret == OPAL_RESOURCE)
 		return;

@@ -302,6 +304,11 @@ static void opal_handle_message(void)
 		return;
 	}
 
+	msg.msg_type = be32_to_cpu(raw_msg.msg_type);
+	msg.reserved = be32_to_cpu(raw_msg.reserved);
+	for (i = 0; i < ARRAY_SIZE(raw_msg.params); i++)
+		msg.params[i] = be64_to_cpu(raw_msg.params[i]);
+
 	/* Sanity check */
 	if (msg.msg_type > OPAL_MSG_TYPE_MAX) {
 		pr_warning("%s: Unknown message type: %u\n",

Index: b/arch/powerpc/platforms/powernv/opal-sensor.c
===================================================================
@@ -33,6 +33,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 {
 	int ret, token;
 	struct opal_msg msg;
+	__be32 data;
 
 	token = opal_async_get_token_interruptible();
 	if (token < 0) {

@@ -42,7 +43,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 	}
 
 	mutex_lock(&opal_sensor_mutex);
-	ret = opal_sensor_read(sensor_hndl, token, sensor_data);
+	ret = opal_sensor_read(sensor_hndl, token, &data);
 	if (ret != OPAL_ASYNC_COMPLETION)
 		goto out_token;
 

@@ -53,6 +54,7 @@ int opal_get_sensor_data(u32 sensor_hndl
 		goto out_token;
 	}
 
+	*sensor_data = be32_to_cpu(data);
 	ret = msg.params[1];
 
 out_token:

Index: b/arch/powerpc/include/asm/opal.h
===================================================================
@@ -886,8 +886,7 @@ int64_t opal_get_param(uint64_t token, u
 		uint64_t length);
 int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer,
 		uint64_t length);
-int64_t opal_sensor_read(uint32_t sensor_hndl, int token,
-		uint32_t *sensor_data);
+int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,

Index: b/drivers/hwmon/ibmpowernv.c
===================================================================
@@ -471,7 +471,7 @@ static int __init powernv_hwmon_init(voi
 	struct device_node *opal, *np = NULL;
 	enum attributes attr_type;
 	enum sensors type;
-	const u32 *sensor_id;
+	u32 sensor_id;
 	u32 sensor_index;
 	int err;
 

@@ -497,14 +497,13 @@ static int __init powernv_hwmon_init(voi
 				&sensor_index))
 			continue;
 
-		sensor_id = of_get_property(np, "sensor-id", NULL);
-		if (!sensor_id) {
+		if (of_property_read_u32(np, "sensor-id", &sensor_id)) {
 			pr_info("%s: %s doesn't have sensor-id\n", __func__,
 					np->name);
 			continue;
 		}
 
-		err = powernv_sensor_init(*sensor_id, np, type, attr_type,
+		err = powernv_sensor_init(sensor_id, np, type, attr_type,
 				sensor_index);
 		if (err) {
 			of_node_put(opal);