From: Meelis Roos <mroos@xxxxx>
Date: Sun, 14 Sep 2008 23:13:25 +0300 (EEST)
> PCI: Scanning PBM /pci@b,2000
> Unable to handle kernel NULL pointer dereference
> tsk->{mm,active_mm}->context = 0000000000000000
> tsk->{mm,active_mm}->pgd = fffff800007e905c
> \|/ ____ \|/
> "@'/ .. \`@"
> /_| \__/ |_\
> \__U_/
> swapper(1): Oops [#1]
> TSTATE: 0000000080f01601 TPC: 000000000043dd48 TNPC: 000000000043dd4c Y: 00000000 Not tainted
> TPC: <psycho_pcierr_intr+0xa8/0x360>
Please try this patch:
diff --git a/arch/sparc64/kernel/pci_psycho.c b/arch/sparc64/kernel/pci_psycho.c
index e205ade..f85b6be 100644
--- a/arch/sparc64/kernel/pci_psycho.c
+++ b/arch/sparc64/kernel/pci_psycho.c
@@ -575,7 +575,7 @@ static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm, int is_pbm
{
unsigned long csr_reg, csr, csr_error_bits;
irqreturn_t ret = IRQ_NONE;
- u16 stat;
+ u16 stat, *addr;
if (is_pbm_a) {
csr_reg = pbm->controller_regs + PSYCHO_PCIA_CTRL;
@@ -597,7 +597,9 @@ static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm, int is_pbm
printk("%s: PCI SERR signal asserted.\n", pbm->name);
ret = IRQ_HANDLED;
}
- pci_read_config_word(pbm->pci_bus->self, PCI_STATUS, &stat);
+ addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
+ 0, PCI_STATUS);
+ pci_config_read16(addr, &stat);
if (stat & (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
@@ -605,7 +607,7 @@ static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm, int is_pbm
PCI_STATUS_SIG_SYSTEM_ERROR)) {
printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
pbm->name, stat);
- pci_write_config_word(pbm->pci_bus->self, PCI_STATUS, 0xffff);
+ pci_config_write16(addr, 0xffff);
ret = IRQ_HANDLED;
}
return ret;
--
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