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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index cc2bd2022198..7835717bc020 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)