Commit b0b027ce authored by Sakari Ailus's avatar Sakari Ailus Committed by Rafael J. Wysocki
Browse files

device property: fwnode_property_read_string_array() returns nr of strings 



Functionally fwnode_property_read_string_array() should match
of_property_read_string_array() and work as a drop-in substitute for the
latter. of_property_read_string_array() returns the number of strings read
if the target string pointer array is non-NULL. Make
fwnode_property_read_string_array() do the same.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 0f194992

drivers/acpi/property.c

+17 −5
Original line number Diff line number Diff line
@@ -714,6 +714,8 @@ static int acpi_data_prop_read_single(struct acpi_device_data *data, 
			return ret;



		*(char **)val = obj->string.pointer;



		return 1;

	} else {

		ret = -EINVAL;

	}
@@ -723,7 +725,15 @@ static int acpi_data_prop_read_single(struct acpi_device_data *data, 
int acpi_dev_prop_read_single(struct acpi_device *adev, const char *propname,

			      enum dev_prop_type proptype, void *val)

{

	return adev ? acpi_data_prop_read_single(&adev->data, propname, proptype, val) : -EINVAL;

	int ret;



	if (!adev)

		return -EINVAL;



	ret = acpi_data_prop_read_single(&adev->data, propname, proptype, val);

	if (ret < 0 || proptype != ACPI_TYPE_STRING)

		return ret;

	return 0;

}



static int acpi_copy_property_array_u8(const union acpi_object *items, u8 *val,
@@ -799,7 +809,7 @@ static int acpi_copy_property_array_string(const union acpi_object *items, 


		val[i] = items[i].string.pointer;

	}

	return 0;

	return nval;

}



static int acpi_data_prop_read(struct acpi_device_data *data,
@@ -813,7 +823,7 @@ static int acpi_data_prop_read(struct acpi_device_data *data, 


	if (val && nval == 1) {

		ret = acpi_data_prop_read_single(data, propname, proptype, val);

		if (!ret)

		if (ret >= 0)

			return ret;

	}
@@ -824,7 +834,7 @@ static int acpi_data_prop_read(struct acpi_device_data *data, 
	if (!val)

		return obj->package.count;



	if (nval > obj->package.count)

	if (proptype != DEV_PROP_STRING && nval > obj->package.count)

		return -EOVERFLOW;

	else if (nval <= 0)

		return -EINVAL;
@@ -845,7 +855,9 @@ static int acpi_data_prop_read(struct acpi_device_data *data, 
		ret = acpi_copy_property_array_u64(items, (u64 *)val, nval);

		break;

	case DEV_PROP_STRING:

		ret = acpi_copy_property_array_string(items, (char **)val, nval);

		ret = acpi_copy_property_array_string(

			items, (char **)val,

			min_t(u32, nval, obj->package.count));

		break;

	default:

		ret = -EINVAL;

drivers/base/property.c

+6 −6
Original line number Diff line number Diff line
@@ -177,7 +177,7 @@ static int pset_prop_read_string_array(struct property_set *pset, 


	memcpy(strings, pointer, length);



	return 0;

	return array_len;

}



static int pset_prop_read_string(struct property_set *pset,
@@ -364,8 +364,8 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array); 
 * Function reads an array of string properties with @propname from the device

 * firmware description and stores them to @val if found.

 *

 * Return: number of values if @val was %NULL,

 *         %0 if the property was found (success),

 * Return: number of values read on success if @val is non-NULL,

 *	   number of values available on success if @val is NULL,

 *	   %-EINVAL if given arguments are not valid,

 *	   %-ENODATA if the property does not have a value,

 *	   %-EPROTO or %-EILSEQ if the property is not an array of strings,
@@ -605,8 +605,8 @@ static int __fwnode_property_read_string(struct fwnode_handle *fwnode, 
 * Read an string list property @propname from the given firmware node and store

 * them to @val if found.

 *

 * Return: number of values if @val was %NULL,

 *         %0 if the property was found (success),

 * Return: number of values read on success if @val is non-NULL,

 *	   number of values available on success if @val is NULL,

 *	   %-EINVAL if given arguments are not valid,

 *	   %-ENODATA if the property does not have a value,

 *	   %-EPROTO or %-EILSEQ if the property is not an array of strings,
@@ -653,7 +653,7 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode, 
	    !IS_ERR_OR_NULL(fwnode->secondary))

		ret = __fwnode_property_read_string(fwnode->secondary,

						    propname, val);

	return ret;

	return ret < 0 ? ret : 0;

}

EXPORT_SYMBOL_GPL(fwnode_property_read_string);

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