From 43f7775944e40221827e4b3aec43824aa4c4e4a9 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 29 Jun 2006 02:24:58 -0700 Subject: [PATCH] genirq: more verbose debugging on unexpected IRQ vectors One frequent sign of IRQ handling bugs is the appearance of unexpected vectors. Print out all the IRQ state in that case. We dont want this patch upstream, but it is useful during initial testing. Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/irq/handle.c | 2 ++ kernel/irq/internals.h | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) (limited to 'kernel') diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 01fc7f79d74..5a360dd4331 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -24,6 +24,7 @@ void fastcall handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) { + print_irq_desc(irq, desc); kstat_this_cpu.irqs[irq]++; ack_bad_irq(irq); } @@ -61,6 +62,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned = { */ static void ack_bad(unsigned int irq) { + print_irq_desc(irq, irq_desc + irq); ack_bad_irq(irq); } diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 2ba8ae3c8e9..08a849a2244 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -22,3 +22,43 @@ static inline void unregister_handler_proc(unsigned int irq, struct irqaction *action) { } #endif +/* + * Debugging printout: + */ + +#include + +#define P(f) if (desc->status & f) printk("%14s set\n", #f) + +static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) +{ + printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n", + irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled); + printk("->handle_irq(): %p, ", desc->handle_irq); + print_symbol("%s\n", (unsigned long)desc->handle_irq); + printk("->chip(): %p, ", desc->chip); + print_symbol("%s\n", (unsigned long)desc->chip); + printk("->action(): %p\n", desc->action); + if (desc->action) { + printk("->action->handler(): %p, ", desc->action->handler); + print_symbol("%s\n", (unsigned long)desc->action->handler); + } + + P(IRQ_INPROGRESS); + P(IRQ_DISABLED); + P(IRQ_PENDING); + P(IRQ_REPLAY); + P(IRQ_AUTODETECT); + P(IRQ_WAITING); + P(IRQ_LEVEL); + P(IRQ_MASKED); +#ifdef CONFIG_IRQ_PER_CPU + P(IRQ_PER_CPU); +#endif + P(IRQ_NOPROBE); + P(IRQ_NOREQUEST); + P(IRQ_NOAUTOEN); +} + +#undef P + -- cgit v1.2.3