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

From: Greg Kroah-Hartman
Date: Mon Mar 16 2015 - 10:53:02 EST


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

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

From: Jiri Kosina <jkosina@xxxxxxx>

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@xxxxxxxxx>
Reported-by: David Herrmann <dh.herrmann@xxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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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