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Commit 66586bab authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Rafael J. Wysocki
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device property: keep single value inplace 



We may save a lot of lines of code and space by keeping single values inside
the struct property_entry. Refactor the implementation to do so.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 318a1971

drivers/base/property.c

+30 −3
Original line number Diff line number Diff line
@@ -72,7 +72,10 @@ static void *pset_prop_find(struct property_set *pset, const char *propname, 
	prop = pset_prop_get(pset, propname);

	if (!prop)

		return ERR_PTR(-EINVAL);

	pointer = prop->value.raw_data;

	if (prop->is_array)

		pointer = prop->pointer.raw_data;

	else

		pointer = &prop->value.raw_data;

	if (!pointer)

		return ERR_PTR(-ENODATA);

	if (length > prop->length)
@@ -167,6 +170,31 @@ static int pset_prop_read_string_array(struct property_set *pset, 
	return 0;

}



static int pset_prop_read_string(struct property_set *pset,

				 const char *propname, const char **strings)

{

	struct property_entry *prop;

	const char **pointer;



	prop = pset_prop_get(pset, propname);

	if (!prop)

		return -EINVAL;

	if (!prop->is_string)

		return -EILSEQ;

	if (prop->is_array) {

		pointer = prop->pointer.str;

		if (!pointer)

			return -ENODATA;

	} else {

		pointer = &prop->value.str;

		if (*pointer && strnlen(*pointer, prop->length) >= prop->length)

			return -EILSEQ;

	}



	*strings = *pointer;

	return 0;

}



static inline struct fwnode_handle *dev_fwnode(struct device *dev)

{

	return IS_ENABLED(CONFIG_OF) && dev->of_node ?
@@ -566,8 +594,7 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode, 
		return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,

					   val, 1);

	else if (is_pset_node(fwnode))

		return pset_prop_read_string_array(to_pset_node(fwnode),

						   propname, val, 1);

		return pset_prop_read_string(to_pset_node(fwnode), propname, val);

	return -ENXIO;

}

EXPORT_SYMBOL_GPL(fwnode_property_read_string);

include/linux/property.h

+23 −8
Original line number Diff line number Diff line
@@ -145,11 +145,17 @@ static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode, 
 * struct property_entry - "Built-in" device property representation.

 * @name: Name of the property.

 * @length: Length of data making up the value.

 * @value: Value of the property (an array of items of the given type).

 * @is_array: True when the property is an array.

 * @is_string: True when property is a string.

 * @pointer: Pointer to the property (an array of items of the given type).

 * @value: Value of the property (when it is a single item of the given type).

 */

struct property_entry {

	const char *name;

	size_t length;

	bool is_array;

	bool is_string;

	union {

		union {

			void *raw_data;

			u8 *u8_data;
@@ -157,8 +163,17 @@ struct property_entry { 
			u32 *u32_data;

			u64 *u64_data;

			const char **str;

		} pointer;

		union {

			unsigned long long raw_data;

			u8 u8_data;

			u16 u16_data;

			u32 u32_data;

			u64 u64_data;

			const char *str;

		} value;

	};

};



/**

 * struct property_set - Collection of "built-in" device properties.