sb 16 pro + alsa 0.5.12a + k 2.4.17 = alsa isapnp bug

[Ludovic Drolez <ldrolez@free.fr>]

Hi !


I recompiled alsa with the '--with-debug=detect' option to find why alsa 0.5.12a works 
perfectly with my 2.2.19 kernel but not with a 2.4.17.
Both kernel are compiled with ISAPNP but Alsa is compiled '--with-isapnp=no' because the 
SB16Pro is not PNP.

With k 2.2.19, 'modprobe snd-card-sb16 snd_irq=5' gives:

Feb 11 18:46:52 red kernel: snd: SB [0x220]: DSP chip found, version = 4.13

Ok, no problem at all, now with 2.4.17:

Feb 11 19:50:57 red kernel: snd: isapnp failed for SB16
Feb 11 19:50:57 red kernel: snd: Sound Blaster 16 soundcard #1 not found at 0x220 or 
device busy
Feb 11 19:50:57 red kernel: snd: Sound Blaster 16 soundcard #2 not found or device busy 


Problem: Alsa tries to detect a PNP card even with '--with-isapnp=no' !
Indeed the 1st line (...isapnp failed...) is output by card-sb16.c line 536.
There is a bug here because 'snd_sb16_isapnp()' should not be reached because of a '#ifdef 
__ISAPNP__' and because 'CONFIG_ISAPNP=0'.

My quick fix to make my card work with 2.4.17:


--- include/driver.h.orig       Mon Feb 11 22:04:50 2002
+++ include/driver.h    Mon Feb 11 22:05:02 2002
@@ -125,21 +125,21 @@

  #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE)
)
  #if (defined(CONFIG_ISAPNP_KERNEL) && defined(ALSA_BUILD)) || (LINUX_VERSION_CO
DE >= KERNEL_VERSION(2, 3, 30) && !defined(ALSA_BUILD))
  #include <linux/isapnp.h>
  #define isapnp_dev pci_dev
  #define isapnp_card pci_bus
  #else
  #include "isapnp.h"
  #endif
  #undef __ISAPNP__
-#define __ISAPNP__
+//#define __ISAPNP__
  #endif

  #ifndef MODULE_LICENSE
  #define MODULE_LICENSE(license)
  #endif

  #ifndef ALSA_BUILD
  #include <linux/asound.h>
  #include <linux/asoundid.h>
  #else


So there must be a problem with all the #if but I do not know exactly where.

(CONFIG_ISAPNP is redefined somewhere but it should not be).


Cheers,

   Ludovic Drolez.




-- 
http://www.palmopensource.com       - The PalmOS Open Source Portal
http://www.drolez.com      - Personal site - Linux and PalmOS stuff


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