From 680de741e835d56e504997b613895058625291e9 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Mon, 27 Mar 2017 16:59:23 +0200
Subject: [PATCH] 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>
---
 drivers/hid/hid-logitech-hidpp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 4aaf237..1cda29e 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)
-- 
2.7.4