Re: kernel panic attaching ahc

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

On Sun, 14 Aug 2011, John D. Baker wrote:

> Whatever changed, it appears to not be related to the GCC update.  I
> built a release from another 5.99.55 source tree dated around 1 August
> 2011 and it panics the same, although a different offset.

Martin Husemann wrote:

> The interesting line of the backtrace is this:
>
>         0x0096c5b0: at ahc_pci_attach+0x1e4

In this older kernel I've working on, the offset is 0x208

>  list *(ahc_pci_attach+0x1e4)
>
> (or whatever is the correct offset now).

According to gdb, the relevant segment of code is:

 list *(ahc_pci_attach+0x208)

0x11e64c is in ahc_pci_attach (/d1/nbsd/current/src/sys/dev/pci/ahc_pci.c:864).
859              * Before we continue probing the card, ensure that
860              * its interrupts are *disabled*.  We don't want
861              * a misstep to hang the machine in an interrupt
862              * storm.
863              */
864             ahc_intr_enable(ahc, FALSE);
865 
866		/*
867              * XXX somehow reading this once fails on some sparc64 systems.
868              *     This may be a problem in the sparc64 PCI code. Doing it

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