If the device data is not accessible for some reason, returning 0 will cause the call to be continuously called again as none of the string has been 'consumed'. --- drivers/hid/hid-lg4ff.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c index cc2bd20..7835717 100644 --- a/drivers/hid/hid-lg4ff.c +++ b/drivers/hid/hid-lg4ff.c @@ -451,13 +451,13 @@ static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *at drv_data = hid_get_drvdata(hid); if (!drv_data) { hid_err(hid, "Private driver data not found!\n"); - return 0; + return -EINVAL; } entry = drv_data->device_props; if (!entry) { hid_err(hid, "Device properties not found!\n"); - return 0; + return -EINVAL; } if (range == 0) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html