On Mon, Aug 25, 2008 at 12:19:16PM -0700, Steve Sakoman wrote:
> ALSA sound/core/pcm_native.c:2573: BUG? (substream != ((void *)0))
Hmmm... this looks odd.
Jarkko, shouldn't that snd_assert() in pcm_native.c check if substream
_is_ NULL instead of !is NULL ?
I mean:
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index c49b9d9..db86090 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -2570,7 +2570,7 @@ static int snd_pcm_playback_ioctl1(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)
{
- snd_assert(substream != NULL, return -ENXIO);
+ snd_assert(substream == NULL, return -ENXIO);
snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return
-EINVAL);
switch (cmd) {
case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
If you follow up the function calls, we can see that substream is
initialized in pcm_native.c:snd_pcm_open_file():
2080 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2081 if (err < 0)
2082 return err;
and that initialized pointer is added to pcm_file in the same function
a few lines later:
2089 pcm_file->substream = substream;
Am I misreading something ? :-s
--
balbi
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