On Tue, 2005-05-03 at 23:56 -0400, Keenan Pepper wrote:
> My Powerbook 3400 I got on Ebay for $100 works great with linux, except
> that the sound driver which worked in 2.6.8 now oopses on modprobe in
> both 2.6.12-rc3 and 2.6.12-rc3-mm2. The oops looks like this:
>
> Oops: kernel access of bad area, sig: 11 [#1]
> PREEMPT
> NIP: C62CC038 LR: C6238BCC SP: C4133E70 REGS: c4133dc0 TRAP: 0300 Not
> tainted
> MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
> DAR: 00000138, DSISR: 20000000
> TASK = c45de0f0[350] 'modprobe' THREAD: c4132000
> Last syscall: 128
> GPR00: 00000000 C4133E70 C45DE0F0 000000D0 C476AC90 00000021 00000000
> 00000001
> GPR08: C028F4ED 00000048 FFFFFFEB 00000061 33003553 1001E284 10017070
> 00000001
> GPR16: 00000000 00000000 00000000 00000000 00000000 100013A4 1001DF18
> 1001E088
> GPR24: 00000000 C476AE00 00000000 C4133EE8 00000021 00000220 C476AC90
> 00000000
> NIP [c62cc038] snd_pmac_dbdma_alloc+0x38/0x104 [snd_powermac]
> LR [c6238bcc] snd_pmac_new+0x8c/0x484 [snd_powermac]
> Call trace:
> [c6238bcc] snd_pmac_new+0x8c/0x484 [snd_powermac]
> [c6238048] snd_pmac_probe+0x48/0x320 [snd_powermac]
> [c6238330] alsa_card_pmac_init+0x10/0x2c [snd_powermac]
> [c003b4e4] sys_init_module+0x264/0x394
> [c0004060] ret_from_syscall+0x0/0x44
Can you edit sound/ppc/pmac.c, and add that to snd_pmac_dbdma_alloc():
unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
+ BUG_ON(chip->pdev == NULL);
+
rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
&rec->dma_base, GFP_KERNEL);
And tell me if you hit the BUG() ?
if it does, can you have a look at what happens in that bit of code in
snd_pmac_detect() :
if (macio == NULL)
printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
else {
struct pci_dev *pdev = NULL;
for_each_pci_dev(pdev) {
struct device_node *np = pci_device_to_OF_node(pdev);
if (np && np == macio->of_node) {
chip->pdev = pdev;
break;
}
}
}
Does it actuall fail to find a suitable pdev ?
Thanks,
Ben.
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