Merge branches 'acpi-apei', 'acpi-properties', 'acpi-sbs' and 'acpi-thermal'

Merge ACPI APEI changes, ACPI device properties handling update, ACPI
SBS driver fixes and ACPI thermal driver cleanup for 6.4-rc1:

 - Make the APEI error injection code warn on invalid arguments when
   explicitly indicated by platform (Shuai Xue).

 - Add CXL error types to the error injection code in APEI (Tony Luck).

 - Refactor acpi_data_prop_read_single() (Andy Shevchenko).

 - Fix two issues in the ACPI SBS driver (Armin Wolf).

 - Replace ternary operator with min_t() in the generic ACPI thermal
   zone driver (Jiangshan Yi).

* acpi-apei:
  ACPI: APEI: EINJ: warn on invalid argument when explicitly indicated by platform
  ACPI: APEI: EINJ: Add CXL error types

* acpi-properties:
  ACPI: property: Refactor acpi_data_prop_read_single()

* acpi-sbs:
  ACPI: SBS: Fix handling of Smart Battery Selectors
  ACPI: EC: Fix oops when removing custom query handlers
  ACPI: EC: Limit explicit removal of query handlers to custom query handlers

* acpi-thermal:
  ACPI: thermal: Replace ternary operator with min_t()

Author: rafaeljw

drivers/acpi/apei/einj.c

@@ -489,9 +489,15 @@ static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
 	if (rc)
 		return rc;
 	val = apei_exec_ctx_get_output(&ctx);
-	if (val != EINJ_STATUS_SUCCESS)
+	if (val == EINJ_STATUS_FAIL)
 		return -EBUSY;
+	else if (val == EINJ_STATUS_INVAL)
+		return -EINVAL;
 
+	/*
+	 * The error is injected into the platform successfully, then it needs
+	 * to trigger the error.
+	 */
 	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
 	if (rc)
 		return rc;
@@ -584,6 +590,12 @@ static const char * const einj_error_type_string[] = {
 	"0x00000200\tPlatform Correctable\n",
 	"0x00000400\tPlatform Uncorrectable non-fatal\n",
 	"0x00000800\tPlatform Uncorrectable fatal\n",
+	"0x00001000\tCXL.cache Protocol Correctable\n",
+	"0x00002000\tCXL.cache Protocol Uncorrectable non-fatal\n",
+	"0x00004000\tCXL.cache Protocol Uncorrectable fatal\n",
+	"0x00008000\tCXL.mem Protocol Correctable\n",
+	"0x00010000\tCXL.mem Protocol Uncorrectable non-fatal\n",
+	"0x00020000\tCXL.mem Protocol Uncorrectable fatal\n",
 };
 
 static int available_error_type_show(struct seq_file *m, void *v)

drivers/acpi/ec.c

@@ -1083,9 +1083,12 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 			      acpi_handle handle, acpi_ec_query_func func,
 			      void *data)
 {
-	struct acpi_ec_query_handler *handler =
-	    kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL);
+	struct acpi_ec_query_handler *handler;
+
+	if (!handle && !func)
+		return -EINVAL;
 
+	handler = kzalloc(sizeof(*handler), GFP_KERNEL);
 	if (!handler)
 		return -ENOMEM;
 
@@ -1097,6 +1100,7 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
 	kref_init(&handler->kref);
 	list_add(&handler->node, &ec->list);
 	mutex_unlock(&ec->mutex);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);
@@ -1109,9 +1113,16 @@ static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,
 
 	mutex_lock(&ec->mutex);
 	list_for_each_entry_safe(handler, tmp, &ec->list, node) {
-		if (remove_all || query_bit == handler->query_bit) {
+		/*
+		 * When remove_all is false, only remove custom query handlers
+		 * which have handler->func set. This is done to preserve query
+		 * handlers discovered thru ACPI, as they should continue handling
+		 * EC queries.
+		 */
+		if (remove_all || (handler->func && handler->query_bit == query_bit)) {
 			list_del_init(&handler->node);
 			list_add(&handler->node, &free_list);
+
 		}
 	}
 	mutex_unlock(&ec->mutex);
@@ -1122,6 +1133,7 @@ static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,
 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
 {
 	acpi_ec_remove_query_handlers(ec, false, query_bit);
+	flush_workqueue(ec_query_wq);
 }
 EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
 

drivers/acpi/property.c

@@ -971,60 +971,48 @@ static int acpi_data_prop_read_single(const struct acpi_device_data *data,
 				      enum dev_prop_type proptype, void *val)
 {
 	const union acpi_object *obj;
-	int ret;
+	int ret = 0;
 
-	if (proptype >= DEV_PROP_U8 && proptype <= DEV_PROP_U64) {
+	if (proptype >= DEV_PROP_U8 && proptype <= DEV_PROP_U64)
 		ret = acpi_data_get_property(data, propname, ACPI_TYPE_INTEGER, &obj);
-		if (ret)
-			return ret;
-
-		switch (proptype) {
-		case DEV_PROP_U8:
-			if (obj->integer.value > U8_MAX)
-				return -EOVERFLOW;
-
-			if (val)
-				*(u8 *)val = obj->integer.value;
-
-			break;
-		case DEV_PROP_U16:
-			if (obj->integer.value > U16_MAX)
-				return -EOVERFLOW;
-
-			if (val)
-				*(u16 *)val = obj->integer.value;
-
-			break;
-		case DEV_PROP_U32:
-			if (obj->integer.value > U32_MAX)
-				return -EOVERFLOW;
-
-			if (val)
-				*(u32 *)val = obj->integer.value;
-
-			break;
-		default:
-			if (val)
-				*(u64 *)val = obj->integer.value;
-
-			break;
-		}
-
-		if (!val)
-			return 1;
-	} else if (proptype == DEV_PROP_STRING) {
+	else if (proptype == DEV_PROP_STRING)
 		ret = acpi_data_get_property(data, propname, ACPI_TYPE_STRING, &obj);
-		if (ret)
-			return ret;
+	if (ret)
+		return ret;
 
+	switch (proptype) {
+	case DEV_PROP_U8:
+		if (obj->integer.value > U8_MAX)
+			return -EOVERFLOW;
+		if (val)
+			*(u8 *)val = obj->integer.value;
+		break;
+	case DEV_PROP_U16:
+		if (obj->integer.value > U16_MAX)
+			return -EOVERFLOW;
+		if (val)
+			*(u16 *)val = obj->integer.value;
+		break;
+	case DEV_PROP_U32:
+		if (obj->integer.value > U32_MAX)
+			return -EOVERFLOW;
+		if (val)
+			*(u32 *)val = obj->integer.value;
+		break;
+	case DEV_PROP_U64:
+		if (val)
+			*(u64 *)val = obj->integer.value;
+		break;
+	case DEV_PROP_STRING:
 		if (val)
 			*(char **)val = obj->string.pointer;
-
 		return 1;
-	} else {
-		ret = -EINVAL;
+	default:
+		return -EINVAL;
 	}
-	return ret;
+
+	/* When no storage provided return number of available values */
+	return val ? 0 : 1;
 }
 
 #define acpi_copy_property_array_uint(items, val, nval)			\

drivers/acpi/sbs.c

@@ -473,23 +473,32 @@ static const struct device_attribute alarm_attr = {
    -------------------------------------------------------------------------- */
 static int acpi_battery_read(struct acpi_battery *battery)
 {
-	int result = 0, saved_present = battery->present;
+	int result, saved_present = battery->present;
 	u16 state;
 
 	if (battery->sbs->manager_present) {
 		result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
 				ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
-		if (!result)
-			battery->present = state & (1 << battery->id);
-		state &= 0x0fff;
+		if (result)
+			return result;
+
+		battery->present = state & (1 << battery->id);
+		if (!battery->present)
+			return 0;
+
+		/* Masking necessary for Smart Battery Selectors */
+		state = 0x0fff;
 		state |= 1 << (battery->id + 12);
 		acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
 				  ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
-	} else if (battery->id == 0)
-		battery->present = 1;
-
-	if (result || !battery->present)
-		return result;
+	} else {
+		if (battery->id == 0) {
+			battery->present = 1;
+		} else {
+			if (!battery->present)
+				return 0;
+		}
+	}
 
 	if (saved_present != battery->present) {
 		battery->update_time = 0;

drivers/acpi/thermal.c

@@ -419,10 +419,9 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 					 * the next higher trip point
 					 */
 					tz->trips.active[i-1].temperature =
-						(tz->trips.active[i-2].temperature <
-						celsius_to_deci_kelvin(act) ?
-						tz->trips.active[i-2].temperature :
-						celsius_to_deci_kelvin(act));
+						min_t(unsigned long,
+						      tz->trips.active[i-2].temperature,
+						      celsius_to_deci_kelvin(act));
 
 				break;
 			} else {