This is a note to let you know that I've just added the patch titled
HID: core: do not scan constant input report
to the 3.14-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-core-do-not-scan-constant-input-report.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e24d0d399b2fce71b627043e900ef28283850482 Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Date: Mon, 31 Mar 2014 13:27:10 -0400
Subject: HID: core: do not scan constant input report
From: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
commit e24d0d399b2fce71b627043e900ef28283850482 upstream.
The Microsoft Surface Type/Touch Cover 2 is a fancy device which advertised
itself as a multitouch device but with constant input reports.
This way, hid_scan_report() gives the group MULTITOUCH to it, but
hid-multitouch can not handle it due to the constant collection ignored
by hid-input.
To prevent such crap in the future, and while we do not fix this particular
device, make the scan_report coherent with hid-input.c, and ignore constant
input reports.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-core.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -718,6 +718,9 @@ static int hid_scan_main(struct hid_pars
case HID_MAIN_ITEM_TAG_END_COLLECTION:
break;
case HID_MAIN_ITEM_TAG_INPUT:
+ /* ignore constant inputs, they will be ignored by hid-input */
+ if (data & HID_MAIN_ITEM_CONSTANT)
+ break;
for (i = 0; i < parser->local.usage_index; i++)
hid_scan_input_usage(parser, parser->local.usage[i]);
break;
Patches currently in stable-queue which might be from benjamin.tissoires@xxxxxxxxxx are
queue-3.14/revert-hid-microsoft-add-id-s-for-surface-type-touch-cover-2.patch
queue-3.14/hid-add-no_init_reports-quirk-for-synaptics-touch-pad-v-103s.patch
queue-3.14/hid-core-do-not-scan-constant-input-report.patch
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