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gpio: acpi: Synchronize acpi_find_gpio() and acpi_gpio_count() 

If we pass connection ID to the both functions and at the same time
acpi_can_fallback_to_crs() returns false we will get different results,
i.e. the number of GPIO resources returned by acpi_gpio_count() might be
not correct.

Fix this by calling acpi_can_fallback_to_crs() in acpi_gpio_count()
before trying to fallback.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2017-05-23 20:03:20 +03:00 committed by Linus Walleij
parent f10e4bf663
commit 6fe9da42f1
1 changed files with 3 additions and 0 deletions
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3
drivers/gpio/gpiolib-acpi.c
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@ -1119,6 +1119,9 @@ int acpi_gpio_count(struct device *dev, const char *con_id)
struct list_head resource_list;
unsigned int crs_count = 0;
if (!acpi_can_fallback_to_crs(adev, con_id))
return count;
INIT_LIST_HEAD(&resource_list);
acpi_dev_get_resources(adev, &resource_list,
acpi_find_gpio_count, &crs_count);