HID: logitech-hidpp: make sure we only register one battery per device

Simple check to add, huge improvement :)

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 4aaf2378897f..1cda29ec0efd 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -828,6 +828,9 @@ static int hidpp_initialize_battery(struct hidpp_device *hidpp)
 {
         int ret;
 
+        if (hidpp->battery.ps)
+                return 0;
+
         if (hidpp->protocol_major >= 2) {
                 ret = hidpp20_initialize_battery(hidpp);
                 if (ret == 0)