[alsa-devel] Unregister a card from userspace?

[Felipe Ferreri Tonello]

Hi Richard,

On 10/11/15 07:55, Ricard Wanderlof wrote:
> 
> On Mon, 9 Nov 2015, Felipe Ferreri Tonello wrote:
> 
>>> while insmodding it works fine, I can't rmmod it because once
>>> snd_soc_register_card() has been called, it has a usage count of 2 and
>>> thus cannot be rmmod:ed.
>>
>> You have to unregister that card upon freeing your module.
> 
> But that is precisely the problem. The framework that manages the 
> insertion and deletion of modules notes that my module has a usage count 
> that is > 0 (in my case it is 2, which I'm convinced is because the card 
> has been registered with ALSA), and refuses to free the module. So there 
> is now way any unregister_card call can be made when my module is freed, 
> as due to the usage count it would never even be attempted.

Do you mean that unbind is never called? Well, the framework should call
bind/unbind for each user of your module.

How is your architecture? If you use one card for each probe of module
then each bind should create one device, right?

-- 
Felipe
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