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| author | Hans de Goede <hdegoede@redhat.com> | 2023-09-09 16:18:09 +0200 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2023-09-11 13:28:25 +0200 |
| commit | 5fb36a8c87d9e99a88d6e9128f1f9ec62f8545f1 (patch) | |
| tree | 3d8b6a1c9271ddf2f74aae0b5490552f661dc2df /drivers | |
| parent | 0bb80ecc33a8fb5a682236443c1e740d5c917d1d (diff) | |
| download | linux-stable-5fb36a8c87d9e99a88d6e9128f1f9ec62f8545f1.tar.gz linux-stable-5fb36a8c87d9e99a88d6e9128f1f9ec62f8545f1.tar.bz2 linux-stable-5fb36a8c87d9e99a88d6e9128f1f9ec62f8545f1.zip | |
gpiolib: acpi: Check if a GPIO is listed in ignore_interrupt earlier
In some cases where a broken AEI is present for a GPIO and the GPIO
is listed in the ignore_interrupt list to avoid the broken event
handler, the kernel may want to use the GPIO for another purpose.
Before this change trying to use such a GPIO for another purpose would
fail, because the ignore_interrupt list was only checked after
the acpi_request_own_gpiod() call, causing the GPIO to already be
claimed even though it is listed in the ignore_interrupt list.
Fix this by moving the ignore_interrupt list to above
the acpi_request_own_gpiod() call.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230909141816.58358-2-hdegoede@redhat.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index fbda452fb4d6..874b4025841b 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -437,6 +437,11 @@ static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, if (!handler) return AE_OK; + if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) { + dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin); + return AE_OK; + } + desc = acpi_request_own_gpiod(chip, agpio, 0, "ACPI:Event"); if (IS_ERR(desc)) { dev_err(chip->parent, @@ -461,11 +466,6 @@ static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, goto fail_unlock_irq; } - if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) { - dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin); - return AE_OK; - } - event = kzalloc(sizeof(*event), GFP_KERNEL); if (!event) goto fail_unlock_irq; |