From: Hans de Goede hdegoede@redhat.com
commit 79b8ded9d9c595db9bd5b2f62f5f738b36de1e22 upstream.
When apply_acpi_orientation() fails, st_accel_common_probe() will fall back to iio_read_mount_matrix(), which checks for a mount-matrix device property and if that is not set falls back to the identity matrix.
But when a sensor has no ACPI companion fwnode, or when the ACPI fwnode does not have a "_ONT" method apply_acpi_orientation() was returning 0, causing iio_read_mount_matrix() to never get called resulting in an invalid mount_matrix:
[root@fedora ~]# cat /sys/bus/iio/devices/iio:device0/mount_matrix (null), (null), (null); (null), (null), (null); (null), (null), (null)
Fix this by making apply_acpi_orientation() always return an error when it did not set the mount_matrix.
Fixes: 3d8ad94bb175 ("iio: accel: st_sensors: Support generic mounting matrix") Signed-off-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Linus Walleij linus.walleij@linaro.org Tested-by: Marius Hoch mail@mariushoch.de Link: https://lore.kernel.org/r/20230416212409.310936-1-hdegoede@redhat.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/accel/st_accel_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -1290,12 +1290,12 @@ static int apply_acpi_orientation(struct
adev = ACPI_COMPANION(indio_dev->dev.parent); if (!adev) - return 0; + return -ENXIO;
/* Read _ONT data, which should be a package of 6 integers. */ status = acpi_evaluate_object(adev->handle, "_ONT", NULL, &buffer); if (status == AE_NOT_FOUND) { - return 0; + return -ENXIO; } else if (ACPI_FAILURE(status)) { dev_warn(&indio_dev->dev, "failed to execute _ONT: %d\n", status);