forked from luck/tmp_suning_uos_patched
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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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318a197182
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@ -72,7 +72,10 @@ static void *pset_prop_find(struct property_set *pset, const char *propname,
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prop = pset_prop_get(pset, propname);
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if (!prop)
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return ERR_PTR(-EINVAL);
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pointer = prop->value.raw_data;
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if (prop->is_array)
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pointer = prop->pointer.raw_data;
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else
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pointer = &prop->value.raw_data;
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if (!pointer)
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return ERR_PTR(-ENODATA);
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if (length > prop->length)
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@ -167,6 +170,31 @@ static int pset_prop_read_string_array(struct property_set *pset,
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return 0;
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}
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static int pset_prop_read_string(struct property_set *pset,
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const char *propname, const char **strings)
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{
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struct property_entry *prop;
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const char **pointer;
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prop = pset_prop_get(pset, propname);
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if (!prop)
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return -EINVAL;
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if (!prop->is_string)
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return -EILSEQ;
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if (prop->is_array) {
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pointer = prop->pointer.str;
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if (!pointer)
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return -ENODATA;
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} else {
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pointer = &prop->value.str;
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if (*pointer && strnlen(*pointer, prop->length) >= prop->length)
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return -EILSEQ;
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}
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*strings = *pointer;
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return 0;
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}
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static inline struct fwnode_handle *dev_fwnode(struct device *dev)
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{
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return IS_ENABLED(CONFIG_OF) && dev->of_node ?
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@ -566,8 +594,7 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
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return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
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val, 1);
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else if (is_pset_node(fwnode))
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return pset_prop_read_string_array(to_pset_node(fwnode),
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propname, val, 1);
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return pset_prop_read_string(to_pset_node(fwnode), propname, val);
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return -ENXIO;
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}
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EXPORT_SYMBOL_GPL(fwnode_property_read_string);
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@ -145,19 +145,34 @@ static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
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* struct property_entry - "Built-in" device property representation.
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* @name: Name of the property.
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* @length: Length of data making up the value.
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* @value: Value of the property (an array of items of the given type).
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* @is_array: True when the property is an array.
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* @is_string: True when property is a string.
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* @pointer: Pointer to the property (an array of items of the given type).
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* @value: Value of the property (when it is a single item of the given type).
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*/
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struct property_entry {
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const char *name;
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size_t length;
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bool is_array;
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bool is_string;
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union {
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void *raw_data;
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u8 *u8_data;
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u16 *u16_data;
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u32 *u32_data;
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u64 *u64_data;
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const char **str;
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} value;
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union {
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void *raw_data;
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u8 *u8_data;
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u16 *u16_data;
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u32 *u32_data;
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u64 *u64_data;
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const char **str;
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} pointer;
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union {
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unsigned long long raw_data;
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u8 u8_data;
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u16 u16_data;
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u32 u32_data;
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u64 u64_data;
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const char *str;
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} value;
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};
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};
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/**
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