Patch "HID: multitouch: force retrieving of Win8 signature blob" has been added to the 4.5-stable tree

Patch "HID: multitouch: force retrieving of Win8 signature blob" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    HID: multitouch: force retrieving of Win8 signature blob

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     hid-multitouch-force-retrieving-of-win8-signature-blob.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 45c5c6828214605eaefa6755c47bd1a2c7eb203e Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Mon, 7 Mar 2016 11:02:38 +0100
Subject: HID: multitouch: force retrieving of Win8 signature blob

From: Benjamin Tissoires <benjamin.tissoires@redhat.com>

commit 45c5c6828214605eaefa6755c47bd1a2c7eb203e upstream.

The Synaptics 0x11e5 over I2C found in the Asus T100-CHI requires to
fetch the signature blob to actually start sending events.

With this patch, we should be close enough to the Windows driver which
checks the content of the blob at plugin to validate or not the
touchscreen.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=113481
Fixes: 6d4f5440 ("HID: multitouch: Fetch feature reports on demand for Win8 devices")
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/hid-multitouch.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -396,6 +396,11 @@ static void mt_feature_mapping(struct hi
 			td->is_buttonpad = true;
 
 		break;
+	case 0xff0000c5:
+		/* Retrieve the Win8 blob once to enable some devices */
+		if (usage->usage_index == 0)
+			mt_get_feature(hdev, field->report);
+		break;
 	}
 }
 


Patches currently in stable-queue which might be from benjamin.tissoires@redhat.com are

queue-4.5/hid-multitouch-force-retrieving-of-win8-signature-blob.patch
queue-4.5/hid-fix-hid_ignore_special_drivers-module-parameter.patch
queue-4.5/hid-i2c-hid-fix-oob-write-in-i2c_hid_set_or_send_report.patch