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[POWERPC] Fix CHRP platforms with only 8259 

On CHRP platforms with only a 8259 controller, we should set the
default IRQ host to the 8259 driver's one for the IRQ probing
fallbacks to work in case the IRQ tree is incorrect (like on
Pegasos for example). Without this fix, we get a bunch of WARN_ON's
during boot.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-10-25 13:22:27 +10:00 committed by Paul Mackerras
parent f49196a5f5
commit f4d4c354bc
3 changed files with 9 additions and 1 deletions
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4
arch/powerpc/platforms/chrp/setup.c
View File

@ -477,8 +477,10 @@ static void __init chrp_find_8259(void)
" address, polling\n");
i8259_init(pic, chrp_int_ack);
if (ppc_md.get_irq == NULL)
if (ppc_md.get_irq == NULL) {
ppc_md.get_irq = i8259_irq;
irq_set_default_host(i8259_get_host());
}
if (chrp_mpic != NULL) {
cascade_irq = irq_of_parse_and_map(pic, 0);
if (cascade_irq == NO_IRQ)

5
arch/powerpc/sysdev/i8259.c
View File

@ -224,6 +224,11 @@ static struct irq_host_ops i8259_host_ops = {
.xlate = i8259_host_xlate,
};
struct irq_host *i8259_get_host(void)
{
return i8259_host;
}
/**
* i8259_init - Initialize the legacy controller
* @node: device node of the legacy PIC (can be NULL, but then, it will match

1
include/asm-powerpc/i8259.h
View File

@ -7,6 +7,7 @@
#ifdef CONFIG_PPC_MERGE
extern void i8259_init(struct device_node *node, unsigned long intack_addr);
extern unsigned int i8259_irq(void);
extern struct irq_host *i8259_get_host(void);
#else
extern void i8259_init(unsigned long intack_addr, int offset);
extern int i8259_irq(void);