linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / sound / isa / gus / gus_pcm.c

diff --git a/sound/isa/gus/gus_pcm.c b/sound/isa/gus/gus_pcm.c
index c7f95e7..d082939 100644 (file)
--- a/sound/isa/gus/gus_pcm.c
+++ b/sound/isa/gus/gus_pcm.c
@@ -114,6 +114,8 @@ static void snd_gf1_pcm_trigger_up(struct snd_pcm_substream *substream)
        unsigned char pan;
        unsigned int voice;
 
+       if (substream == NULL)
+               return;
        spin_lock_irqsave(&pcmp->lock, flags);
        if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
                spin_unlock_irqrestore(&pcmp->lock, flags);