HID: logitech: Prevent possibility of infinite loop when using /sys interface

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'.

Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index cc2bd20221989aa0284269cce533c28ab2e7295c..7835717bc02011d4ed2638caca9472021394245b 100644 (file)
--- 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)