From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Fri, 27 Dec 2013 01:44:29 +0000 (-0800)
Subject: Input: allocate absinfo data when setting ABS capability
X-Git-Tag: firefly_0821_release~3679^2~3176
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2d8ccbd72d8e44d40daa7500a5a78cc8ccad02f1;p=firefly-linux-kernel-4.4.55.git

Input: allocate absinfo data when setting ABS capability

commit 28a2a2e1aedbe2d8b2301e6e0e4e63f6e4177aca upstream.

We need to make sure we allocate absinfo data when we are setting one of
EV_ABS/ABS_XXX capabilities, otherwise we may bomb when we try to emit this
event.

Rested-by: Paul Cercueil <pcercuei@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/input/input.c b/drivers/input/input.c
index c04469928925..66984e272c45 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -1866,6 +1866,10 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
 		break;
 
 	case EV_ABS:
+		input_alloc_absinfo(dev);
+		if (!dev->absinfo)
+			return;
+
 		__set_bit(code, dev->absbit);
 		break;