[alsa-devel] Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"

[Maciej Paszta]

Thanks!

Changing to 256 made all devices appear!

On 2012-05-08 15:32, Takashi Iwai wrote:
> At Tue, 08 May 2012 15:02:33 +0200,
> Clemens Ladisch wrote:
>> Maciej Paszta wrote:
>>> Quick reminder: I have  10 sound cards which need to have oss emulation
>>> enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
>>> patch to workaround this problem:
>>> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
>>> I've applied it to kernel 3.0.0 and the only result I get is message
>>> appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
>>> done some debugging and the registration fails on these lines
>>> (sound/core/sound_oss.c):
>>> register1 = register_sound_special_device(f_ops, minor, carddev);
>> Try replacing 128 with 256 in register_sound_special_device() in
>> sound/sound_core.c.
> Actually it should be 256, instead of 256 + unit, like the patch below.
>
>
> Takashi
>
> ---
> diff --git a/sound/sound_core.c b/sound/sound_core.c
> index c6e81fb..fb9255c 100644
> --- a/sound/sound_core.c
> +++ b/sound/sound_core.c
> @@ -361,7 +361,7 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
>   				  struct device *dev)
>   {
>   	const int chain = unit % SOUND_STEP;
> -	int max_unit = 128 + chain;
> +	int max_unit = 256;
>   	const char *name;
>   	char _name[16];
>
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-- 
Maciej Paszta
Mobile Systems Research Labs, Poznan University of Technology