| Message ID | 1429022112-231578-1-git-send-email-mika.westerberg@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Jiri Kosina |
| Headers | show |
On Tue, 14 Apr 2015, Mika Westerberg wrote: > Using GPIOs and gpiolib is optional. If the kernel is compiled without GPIO > support the driver should not fail if it finds the interrupt using normal > methods. > > However, commit a485923efbb8 ("HID: i2c-hid: Add support for ACPI GPIO > interrupts") did not take into account that acpi_dev_add_driver_gpios() > returns -ENXIO when !CONFIG_GPIOLIB. > > Fix this by checking the return value against -ENXIO and 0 and only in that > case fail the probe. > > Reported-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> I have applied this to for-4.1/upstream-fixes.
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index ab4dd952b6ba..92d6cdf02460 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -862,6 +862,7 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client, union acpi_object *obj; struct acpi_device *adev; acpi_handle handle; + int ret; handle = ACPI_HANDLE(&client->dev); if (!handle || acpi_bus_get_device(handle, &adev)) @@ -877,7 +878,9 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client, pdata->hid_descriptor_address = obj->integer.value; ACPI_FREE(obj); - return acpi_dev_add_driver_gpios(adev, i2c_hid_acpi_gpios); + /* GPIOs are optional */ + ret = acpi_dev_add_driver_gpios(adev, i2c_hid_acpi_gpios); + return ret < 0 && ret != -ENXIO ? ret : 0; } static const struct acpi_device_id i2c_hid_acpi_match[] = {
Using GPIOs and gpiolib is optional. If the kernel is compiled without GPIO support the driver should not fail if it finds the interrupt using normal methods. However, commit a485923efbb8 ("HID: i2c-hid: Add support for ACPI GPIO interrupts") did not take into account that acpi_dev_add_driver_gpios() returns -ENXIO when !CONFIG_GPIOLIB. Fix this by checking the return value against -ENXIO and 0 and only in that case fail the probe. Reported-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- drivers/hid/i2c-hid/i2c-hid.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)