gpiolib: acpi: Make sure we fill struct acpi_gpio_info

The previous refactoring missed the filling of the struct acpi_gpio_info
and that's how the lot of the code got eliminated. Restore those pieces
by passing the pointer all down in the call stack.

With this, the code grows by ~6%, but in conjunction with the previous
refactoring it still gives -387 bytes

add/remove: 2/0 grow/shrink: 5/1 up/down: 852/-35 (817)
Function                                     old     new   delta
acpi_dev_gpio_irq_wake_get_by                129     695    +566
acpi_find_gpio                               216     354    +138
acpi_find_gpio.__UNIQUE_ID_ddebug504           -      56     +56
acpi_dev_gpio_irq_wake_get_by.__UNIQUE_ID_ddebug506       -      56     +56
acpi_populate_gpio_lookup                    536     548     +12
acpi_gpio_property_lookup                    414     426     +12
acpi_get_gpiod_by_index                      307     319     +12
__acpi_find_gpio                             638     603     -35
Total: Before=14154, After=14971, chg +5.77%

As a positive side effect, it improves memory footprint for
struct acpi_gpio_lookup. `pahole` difference before and after:

-       /* size: 64, cachelines: 1, members: 4 */
-       /* member types with holes: 1, total: 1 */

+       /* size: 32, cachelines: 1, members: 4 */

Reported-by: Kees Bakker <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]
Fixes: 8b4f52e ("gpiolib: acpi: Deduplicate some code in __acpi_find_gpio()")
Acked-by: Mika Westerberg <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>

Author: andy-shev

drivers/gpio/gpiolib-acpi.c

@@ -743,8 +743,8 @@ static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
 }
 
 struct acpi_gpio_lookup {
-	struct acpi_gpio_info info;
 	struct acpi_gpio_params params;
+	struct acpi_gpio_info *info;
 	struct gpio_desc *desc;
 	int n;
 };
@@ -753,7 +753,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
 {
 	struct acpi_gpio_lookup *lookup = data;
 	struct acpi_gpio_params *params = &lookup->params;
-	struct acpi_gpio_info *info = &lookup->info;
+	struct acpi_gpio_info *info = lookup->info;
 
 	if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
 		return 1;
@@ -807,7 +807,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
 
 static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup)
 {
-	struct acpi_gpio_info *info = &lookup->info;
+	struct acpi_gpio_info *info = lookup->info;
 	struct acpi_device *adev = info->adev;
 	struct list_head res_list;
 	int ret;
@@ -833,7 +833,7 @@ static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode, const char *p
 {
 	struct fwnode_reference_args args;
 	struct acpi_gpio_params *params = &lookup->params;
-	struct acpi_gpio_info *info = &lookup->info;
+	struct acpi_gpio_info *info = lookup->info;
 	unsigned int index = params->crs_entry_index;
 	unsigned int quirks = 0;
 	int ret;
@@ -894,8 +894,8 @@ static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode, const char *p
 static int acpi_get_gpiod_by_index(struct acpi_device *adev, const char *propname,
 				   struct acpi_gpio_lookup *lookup)
 {
-	struct acpi_gpio_info *info = &lookup->info;
 	struct acpi_gpio_params *params = &lookup->params;
+	struct acpi_gpio_info *info = lookup->info;
 	int ret;
 
 	if (propname) {
@@ -976,6 +976,7 @@ __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int
 
 	memset(&lookup, 0, sizeof(lookup));
 	lookup.params.crs_entry_index = idx;
+	lookup.info = info;
 
 	/* Try first from _DSD */
 	for_each_gpio_property_name(propname, con_id) {