[PATCH 5/6] powerpc: Rearrange and fix show_interrupts() for sparse irq_descs
From: Michael Ellerman <hidden>
Date: 2009-10-14 05:45:00
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Move the default case out of the if, ie. when we're just displaying an irq. And consolidate all the odd cases at the top, ie. printing the header and footer. And in the process cope with sparse irq_descs. Signed-off-by: Michael Ellerman <redacted> --- arch/powerpc/kernel/irq.c | 64 ++++++++++++++++++++++++++------------------- 1 files changed, 37 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index baa49eb..63e27d5 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c@@ -187,33 +187,7 @@ int show_interrupts(struct seq_file *p, void *v) for_each_online_cpu(j) seq_printf(p, "CPU%d ", j); seq_putc(p, '\n'); - } - - if (i < NR_IRQS) { - desc = irq_to_desc(i); - spin_lock_irqsave(&desc->lock, flags); - action = desc->action; - if (!action || !action->handler) - goto skip; - seq_printf(p, "%3d: ", i); -#ifdef CONFIG_SMP - for_each_online_cpu(j) - seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); -#else - seq_printf(p, "%10u ", kstat_irqs(i)); -#endif /* CONFIG_SMP */ - if (desc->chip) - seq_printf(p, " %s ", desc->chip->typename); - else - seq_puts(p, " None "); - seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge "); - seq_printf(p, " %s", action->name); - for (action = action->next; action; action = action->next) - seq_printf(p, ", %s", action->name); - seq_putc(p, '\n'); -skip: - spin_unlock_irqrestore(&desc->lock, flags); - } else if (i == NR_IRQS) { + } else if (i == nr_irqs) { #if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT) if (tau_initialized){ seq_puts(p, "TAU: ");
@@ -223,7 +197,43 @@ skip: } #endif /* CONFIG_PPC32 && CONFIG_TAU_INT*/ seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts); + + return 0; } + + desc = irq_to_desc(i); + if (!desc) + return 0; + + spin_lock_irqsave(&desc->lock, flags); + + action = desc->action; + if (!action || !action->handler) + goto skip; + + seq_printf(p, "%3d: ", i); +#ifdef CONFIG_SMP + for_each_online_cpu(j) + seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); +#else + seq_printf(p, "%10u ", kstat_irqs(i)); +#endif /* CONFIG_SMP */ + + if (desc->chip) + seq_printf(p, " %s ", desc->chip->typename); + else + seq_puts(p, " None "); + + seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge "); + seq_printf(p, " %s", action->name); + + for (action = action->next; action; action = action->next) + seq_printf(p, ", %s", action->name); + seq_putc(p, '\n'); + +skip: + spin_unlock_irqrestore(&desc->lock, flags); + return 0; }
--
1.6.2.1