ALSA: hda - Add sanity check in PCM open callback

Add some sanity checks of struct snd_pcm_hardware fields in the PCM
open callback of hda driver.  This makes a bit easier to debug any PCM
setup errors in the codec side.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b36dc46..1877d95 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1464,6 +1464,12 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
        snd_pcm_set_sync(substream);
        mutex_unlock(&chip->open_mutex);
 
+       if (snd_BUG_ON(!runtime->hw.channels_min || !runtime->hw.channels_max))
+               return -EINVAL;
+       if (snd_BUG_ON(!runtime->hw.formats))
+               return -EINVAL;
+       if (snd_BUG_ON(!runtime->hw.rates))
+               return -EINVAL;
        return 0;
 }