[ALSA] seq_midi_event: fix parsing of F9/FD bytes

Check for a valid event type when encoding a system real-time message to prevent the bytes F9 or FD resulting in an empty sequencer message. Signed-off-by: Clemens Ladisch <[email protected]> Signed-off-by: Jaroslav Kysela <[email protected]>
klaby · Oct 16, 2007 · 0e75182 · 0e75182
1 parent bf8c138
commit 0e75182
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c
@@ -252,7 +252,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
 		ev->type = status_event[ST_SPECIAL + c - 0xf0].event;
 		ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
 		ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
-		return 1;
+		return ev->type != SNDRV_SEQ_EVENT_NONE;
 	}
 
 	spin_lock_irqsave(&dev->lock, flags);