linux-kernel - [PATCH 2/7] Revert "HID: logitech: fix a used uninitialized GCC warning"

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Message-Id: <20181121152712.6770-3-benjamin.tissoires@redhat.com>
Date:   Wed, 21 Nov 2018 16:27:07 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jiri Kosina <jikos@...nel.org>,
        Harry Cutts <hcutts@...omium.org>,
        Peter Hutterer <peter.hutterer@...-t.net>,
        torvalds@...ux-foundation.org
Cc:     Nestor Lopez Casado <nlopezcasad@...itech.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH 2/7] Revert "HID: logitech: fix a used uninitialized GCC warning"

This reverts commit 5fe2ccbef9d7aecf5c4402c753444f1a12096cfd.

It turns out the current API is not that compatible with
some Microsoft mice, so better start again from scratch.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
 drivers/hid/hid-logitech-hidpp.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index f01280898b24..5f0c080059c6 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -1231,6 +1231,7 @@ 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);
@@ -2695,7 +2696,7 @@ 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 = 8;
+	u8 multiplier;
 
 	if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2121) {
 		ret = hidpp_hrw_set_wheel_mode(hidpp, false, true, false);
@@ -2703,9 +2704,10 @@ 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;
 
-- 
2.19.1