Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [PATCH v1 5/8] gpio: acpi: Synchronize acpi_find_gpio() and acpi_gpio_count() | Date | Thu, 23 Mar 2017 21:46:15 +0200 |
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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 resourses 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> --- drivers/gpio/gpiolib-acpi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index e516b7a0cc50..61518273e360 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -1111,6 +1111,9 @@ 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); -- 2.11.0
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