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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 년 전
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dec3eb01c2
1개의 변경된 파일2개의 추가작업 그리고 1개의 파일을 삭제
  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;
 	}