From: Peter Hutterer <peter.hutterer@who-t.net>
To: linux-input@vger.kernel.org
Cc: "Benjamin Tissoires" <benjamin.tissoires@redhat.com>,
"Aimo Metsälä" <aimetsal@outlook.com>,
nlopezcasad@logitech.com, "Jiri Kosina" <jikos@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH] HID: logitech: Handle 0 scroll events for the m560
Date: Wed, 20 Mar 2019 08:48:23 +1000 [thread overview]
Message-ID: <20190319224823.GA26366@jelly> (raw)
hidpp_scroll_counter_handle_scroll() doesn't expect a 0-value scroll event, it
gets interpreted as a negative scroll direction event. This can cause scroll
direction resets and thus broken scrolling.
Reported-and-tested-by: Aimo Metsälä <aimetsal@outlook.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
drivers/hid/hid-logitech-hidpp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 15ed6177a7a3..f040c8a7f9a9 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2608,8 +2608,9 @@ static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
input_report_rel(mydata->input, REL_Y, v);
v = hid_snto32(data[6], 8);
- hidpp_scroll_counter_handle_scroll(
- &hidpp->vertical_wheel_counter, v);
+ if (v != 0)
+ hidpp_scroll_counter_handle_scroll(
+ &hidpp->vertical_wheel_counter, v);
input_sync(mydata->input);
}
--
2.20.1
next reply other threads:[~2019-03-19 22:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-19 22:48 Peter Hutterer [this message]
2019-03-20 14:29 ` [PATCH] HID: logitech: Handle 0 scroll events for the m560 Benjamin Tissoires
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