Hi there,
after many reboots I finally fixed an error in a driver but I am not
sure if there ain't an underlying problem which causes this error.
The initialization is done with
struct snd_pcm *pcm;
int err;
if((err = snd_pcm_new(chip->pod->line6.card, (char
*)chip->pod->line6.devname, 0, 1, 1, &pcm)) < 0)
return err;
pcm->private_data = chip;
pcm->private_free = pod_cleanup_pcm;
chip->pcm = pcm;
However in hw_param, substream->private_data is NULL and I have to get
the right value with this construct:
static int snd_pod_capture_hw_params(struct snd_pcm_substream
*substream, struct snd_pcm_hw_params *hw_params)
{
int ret;
struct snd_pod_pcm *chip = snd_pcm_substream_chip(substream);
/* -- Florian Demski [FD] */
/* don't ask me why, but this fixes the bug on my machine */
if ( chip == NULL ) {
if ( substream->pcm == NULL )
return -ENOMEM;
if ( substream->pcm->private_data == NULL )
return -ENOMEM;
substream->private_data = substream->pcm->private_data;
chip = snd_pcm_substream_chip( substream );
}
/* -- [FD] end */
Somehow only my machine produces this error, I tried switching off SMP
and PREEMPT, but with no other result.
Or is this possibly an (undocumented) feature in alsa?
I'd be happy if actually some of you experienced guys might take a look
at that driver:
SVN
https://line6linux.svn.sourceforge.net/svnroot/line6linux/driver/trunk
Browse
https://line6linux.svn.sourceforge.net/viewvc/line6linux/driver/trunk/
Thanks in advance,
Florian
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