linux-kernel - [PATCH] HID: multitouch: Synchronize MT frame on reset

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Date:	Tue, 29 Mar 2016 22:10:41 +0200
From:	Gabriele Mazzotta <gabriele.mzt@...il.com>
To:	jikos@...nel.org
Cc:	benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, bleung@...omium.org,
	Gabriele Mazzotta <gabriele.mzt@...il.com>
Subject: [PATCH] HID: multitouch: Synchronize MT frame on reset_resume

input_mt_get_slot_by_key() requires input_mt_sync_frame() to be called
at each frame. Do it when releasing the touches, or else we won't get
a proper slot number after mt_reset_resume().

Signed-off-by: Gabriele Mazzotta <gabriele.mzt@...il.com>
---
 drivers/hid/hid-multitouch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 25d3c43..c741f5e 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1169,6 +1169,7 @@ static void mt_release_contacts(struct hid_device *hid)
 							   MT_TOOL_FINGER,
 							   false);
 			}
+			input_mt_sync_frame(input_dev);
 			input_sync(input_dev);
 		}
 	}
-- 
2.8.0.rc3