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A race condition exists between the probe of cros-ec-sysfs and cros-ec-sensorhub. The `kb_wake_angle` attribute should only be visible if the sensor hub detects two or more accelerometers. If cros_ec_sysfs_probe() runs before cros_ec_sensorhub_register() completes sensor enumeration, the sysfs attributes are created while `has_kb_wake_angle` is still false, hiding `kb_wake_angle` incorrectly. Store the created attribute group pointer in `ec_dev->group`. When the sensor hub completes sensor enumeration, it checks for this group and calls sysfs_update_group() to notify the sysfs core to re-evaluate attribute visibility. This ensures the `kb_wake_angle` attribute visibility is correctly updated regardless of the driver probe order. Co-developed-by: Gwendal Grignou <gwendal@chromium.org> Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Link: https://lore.kernel.org/r/20260407102615.1605317-1-tzungbi@kernel.org Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>