HID: logitech: fix a used uninitialized GCC warning

Fix the following compile warning:

drivers/hid/hid-logitech-hidpp.c: In function 'hi_res_scroll_enable':
drivers/hid/hid-logitech-hidpp.c:2714:54: warning: 'multiplier' may be used uninitialized in this function [-Wmaybe-uninitialized]
  hidpp->vertical_wheel_counter.resolution_multiplier = multiplier;

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 5f0c080059c68dbfc2eb84f3d8e0e02dd3367461..f01280898b24bd7fea8770417137586823578550 100644 (file)
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -1231,7 +1231,6 @@ static int hidpp_hrw_get_wheel_capability(struct hidpp_device *hidpp,
        *multiplier = response.fap.params[0];
        return 0;
 return_default:
-       *multiplier = 8;
        hid_warn(hidpp->hid_dev,
                 "Couldn't get wheel multiplier (error %d), assuming %d.\n",
                 ret, *multiplier);
@@ -2696,7 +2695,7 @@ static int hi_res_scroll_look_up_microns(__u32 product_id)
 static int hi_res_scroll_enable(struct hidpp_device *hidpp)
 {
        int ret;
-       u8 multiplier;
+       u8 multiplier = 8;
 
        if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2121) {
                ret = hidpp_hrw_set_wheel_mode(hidpp, false, true, false);
@@ -2704,10 +2703,9 @@ static int hi_res_scroll_enable(struct hidpp_device *hidpp)
        } else if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2120) {
                ret = hidpp_hrs_set_highres_scrolling_mode(hidpp, true,
                                                           &multiplier);
-       } else /* if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_1P0) */ {
+       } else /* if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_1P0) */
                ret = hidpp10_enable_scrolling_acceleration(hidpp);
-               multiplier = 8;
-       }
+
        if (ret)
                return ret;