From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felipe Ferreri Tonello Subject: Re: Unregister a card from userspace? Date: Wed, 11 Nov 2015 10:34:53 +0000 Message-ID: <564319CD.3070305@felipetonello.com> References: <56408259.2030604@felipetonello.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------070601090704050107010009" Return-path: Received: from mail-wm0-f44.google.com (mail-wm0-f44.google.com [74.125.82.44]) by alsa0.perex.cz (Postfix) with ESMTP id 4D43D2605EE for ; Wed, 11 Nov 2015 11:34:56 +0100 (CET) Received: by wmec201 with SMTP id c201so175008321wme.0 for ; Wed, 11 Nov 2015 02:34:56 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Ricard Wanderlof Cc: alsa-devel List-Id: alsa-devel@alsa-project.org This is a multi-part message in MIME format. --------------070601090704050107010009 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit 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 --------------070601090704050107010009 Content-Type: application/pgp-keys; name="0x92698E6A.asc" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="0x92698E6A.asc" -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v2 mQINBFYedIcBEACVKGKoEjb3zlvAz5SUvBej7Sx13BPd8hVulQD+mqjfuRFPmZA5 LBXPX1zTRWwGEbbZegP3tLfKP+XekzO6BQhDihMmKuRusdgDsdMtldwhjHuUwKn7 kxB2k79jSG802lAjIv2l5hijOfKIGTATKwiMijuXho54DGltIgNyN/Onwk9HnM6d jsV5uubaI468JRH6j8HXXievo24BDvsimIE75ImiM53ruiwPwEry1hi1CnE5OpqG oe/lt27+nLXijfNZOpBZ3Q+RPVBdqPTkMlBJAa4sg+qwZoSMvQJFAGROiJ7+ICCW O4GPMrAn8CRcCI9ENKBj2dQ4bBEP1a+f16GNMUUU37wocqtyNHo0Pa/DnFh91kcu /2dvUX4XPeEimEoSKroRLOXC9RGSFYB/r9UXqFgbmyQ4TZLx0mAWIjoUQtbIJNRz Pt46UeznCVLJTg7CzIvtv8vwmMFvaepr8ONoZn+tpX8VW4dgzsMZDrVspE0Vg3oo K9JRi1nN3GcJJK4zG2ShvEkPffRHuBuyX5wR8MPRYTShKnJR5qd1cCSK73fCv4DP bjywmGjucqcLiyYbByjmHaqzRaKJclmT/jhs6qZHs+pVLkmHkHdf/WLP6Xgcvmo8 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