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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-05-23 20:03:20 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-05-29 11:18:44 +0200 |
| commit | 6fe9da42f1d98fdb4be1598e230aca97e66cf35d (patch) | |
| tree | 2739ee553b7d5e00333196dc9e6a422a48738c62 /drivers/gpio | |
| parent | f10e4bf6632b5be11cea875b66ba959833a69258 (diff) | |
| download | lwn-6fe9da42f1d98fdb4be1598e230aca97e66cf35d.tar.gz lwn-6fe9da42f1d98fdb4be1598e230aca97e66cf35d.zip | |
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>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 0392d8ed332f..740df0e9dcb3 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -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); |