[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 <redacted>
---
 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

Hi Gabriele,

Thanks for the fix!

On Tue, Mar 29, 2016 at 1:10 PM, Gabriele Mazzotta
[off-list ref] wrote:

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 <redacted>

Reviewed-by: Benson Leung <bleung@chromium.org>

-- 
Benson Leung
Senior Software Engineer, Chrom* OS
bleung@chromium.org

On Mar 29 2016 or thereabouts, Gabriele Mazzotta wrote:

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 <redacted>

Thanks for the fix (I should have spot that earlier :( )

Reviewed-by: Benjamin TIssoires <redacted>

Cheers,
Benjamin

On Tue, 29 Mar 2016, Gabriele Mazzotta wrote:

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 <redacted>

Queued for 4.6. Thanks,

-- 
Jiri Kosina
SUSE Labs