From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Corlett Subject: ISA pnp & kernel 2.6 Date: Wed, 11 Feb 2004 21:57:35 +0000 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <402AA54F.3050705@gremlin> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org I have an ISA pnp card (opti931) which stopped working when I installed kernel 2.6 and the problem is as follows: The kernel function that sets and activates the card is isapnp_set_resources (in drivers/pnp/isapnp/core.c) and for each resource, it is checking that the correct flag is set before writing to the port (i.e. IORESOURCE_IO, IORESOURCE_IRQ, IORESOURCE_DMA, IORESOURCE_MEM) however, these flags are never being set because the driver code is just using pnp_init_resource_table followed by pnp_resource_change for each setting and so the configuration is never written to the card. (I believe that the equivalent code in 2.4 just checked for flags != 0). As I see it, there are four options: 1) Manually set the flags in the driver code (this is what I have done temporarily to get the card working). 2) Change the test in isapnp_set_resources to ((flags & IORESOURCE_xx) | (~flags & IORESOURCE_AUTO)) as anything that has been auto-allocated should have the appropriate flag set. 3) Change pnp_resource_change to clear IORESOURCE_UNSET and change the test in isapnp_set_resources to (~flags & IORESOURCE_UNSET) 4) In the driver, use something else apart from pnp_resource_change (i.e. is there now a preferred method for filling in the settings). I prefer 3) or else 2) but are there any reasons not to do this? Any advice welcome. Michael. ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click