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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>
Dmitry Torokhov 18 年之前
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dec3eb01c2
共有 1 個文件被更改,包括 2 次插入1 次删除
  1. 2 1
      drivers/input/ff-core.c

+ 2 - 1
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;
 	}