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ALSA: opl3: Fix possible negative array index access 

Spotted by coverity CID 115196.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2013-10-29 15:07:19 +01:00
parent a40a393722
commit a8d09e3a6d
1 changed files with 5 additions and 0 deletions
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5
sound/drivers/opl3/opl3_midi.c
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@ -390,6 +390,11 @@ void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
voice = snd_opl3_oss_map[chan->number];
}
if (voice < 0) {
spin_unlock_irqrestore(&opl3->voice_lock, flags);
return;
}
if (voice < MAX_OPL2_VOICES) {
/* Left register block for voices 0 .. 8 */
reg_side = OPL3_LEFT;