HID: hid-input: fix compile for !HID_BATTERY_STRENGTH

As reported by Stephen Rothwell:
drivers/hid/hid-input.c: In function 'hidinput_hid_event':
drivers/hid/hid-input.c:865:6: error: 'struct hid_device' has no member
named 'battery_val'
drivers/hid/hid-input.c:866:3: error: 'struct hid_device' has no member
named 'battery_min'
drivers/hid/hid-input.c:866:3: error: 'struct hid_device' has no member
named 'battery_max'

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 2d96b782b203..b9b8c75a6f9a 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -861,13 +861,14 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
 
         input = field->hidinput->input;
 
+#ifdef CONFIG_HID_BATTERY_STRENGTH
         if (usage->hid == HID_DC_BATTERYSTRENGTH) {
                 hid->battery_val = value;
                 hid_dbg(hid, "battery value is %d (range %d-%d)\n",
                         value, hid->battery_min, hid->battery_max);
                 return;
         }
-
+#endif
         if (!usage->type)
                 return;