From: Dmitry Torokhov <dtor@insightbb.com>
Date: Thu, 3 May 2007 04:51:10 +0000 (-0400)
Subject: Input: force feedback - make sure effect is present before playing
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=dec3eb01c2409ca8276c1152c167add66a37d1ba;p=linux.git

Input: force feedback - make sure effect is present before playing

Make sure that requested effect id is not out of range for the
device and that effect is present before requesting device to
play it.

Reported-by: Jan Kratochvil <honza@jikos.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index 783b3412ceada..eebc72465fc9b 100644
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -281,7 +281,8 @@ int input_ff_event(struct input_dev *dev, unsigned int type,
 		break;
 
 	default:
-		ff->playback(dev, code, value);
+		if (check_effect_access(ff, code, NULL) == 0)
+			ff->playback(dev, code, value);
 		break;
 	}