From f4d4c354bca18210296cc0a8f592c0cdb720bf20 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 25 Oct 2006 13:22:27 +1000 Subject: [PATCH] [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 Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/chrp/setup.c | 4 +++- arch/powerpc/sysdev/i8259.c | 5 +++++ include/asm-powerpc/i8259.h | 1 + 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c index cae3d13229..49b8dabcbc 100644 --- a/arch/powerpc/platforms/chrp/setup.c +++ b/arch/powerpc/platforms/chrp/setup.c @@ -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) diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c index 0450265d73..ad87adc975 100644 --- a/arch/powerpc/sysdev/i8259.c +++ b/arch/powerpc/sysdev/i8259.c @@ -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 diff --git a/include/asm-powerpc/i8259.h b/include/asm-powerpc/i8259.h index 78489fb8d1..db1362f8c6 100644 --- a/include/asm-powerpc/i8259.h +++ b/include/asm-powerpc/i8259.h @@ -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); -- 2.39.5