linux-kernel - [PATCH 3.14 86/96] HID: fixup the conflicting keyboard mappings quirk

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Date:	Mon, 16 Mar 2015 15:09:57 +0100
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Fredrik Hallenberg <megahallon@...il.com>,
	David Herrmann <dh.herrmann@...il.com>,
	Jiri Kosina <jkosina@...e.cz>
Subject: [PATCH 3.14 86/96] HID: fixup the conflicting keyboard mappings quirk

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jiri Kosina <jkosina@...e.cz>

commit 8e7b341037db1835ee6eea64663013cbfcf33575 upstream.

The ignore check that got added in 6ce901eb61 ("HID: input: fix confusion
on conflicting mappings") needs to properly check for VARIABLE reports
as well (ARRAY reports should be ignored), otherwise legitimate keyboards
might break.

Fixes: 6ce901eb61 ("HID: input: fix confusion on conflicting mappings")
Reported-by: Fredrik Hallenberg <megahallon@...il.com>
Reported-by: David Herrmann <dh.herrmann@...il.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hid/hid-input.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1078,6 +1078,7 @@ void hidinput_hid_event(struct hid_devic
 	 */
 	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
 	                      HID_MAIN_ITEM_BUFFERED_BYTE)) &&
+			      (field->flags & HID_MAIN_ITEM_VARIABLE) &&
 	    usage->usage_index < field->maxusage &&
 	    value == field->value[usage->usage_index])
 		return;


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