V4L/DVB (8026): Avoids an OOPS if dev struct can't be successfully recovered

[linux-2.6-omap-h63xx.git] / drivers / media / video / saa7134 / saa7134-alsa.c

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index ba3082422a01915dce20bce15832c495e9555d89..f118de6e36722950b43b5cb21d64520a32386f1f 100644 (file)
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -613,9 +613,15 @@ static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
        struct snd_pcm_runtime *runtime = substream->runtime;
        snd_card_saa7134_pcm_t *pcm;
        snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
-       struct saa7134_dev *dev = saa7134->dev;
+       struct saa7134_dev *dev;
        int amux, err;
 
+       if (!saa7134) {
+               printk(KERN_ERR "BUG: saa7134 can't find device struct."
+                               " Can't proceed with open\n");
+               return -ENODEV;
+       }
+       dev = saa7134->dev;
        mutex_lock(&dev->dmasound.lock);
 
        dev->dmasound.read_count  = 0;