diff options
Diffstat (limited to 'arch/i386/kernel/irq.c')
| -rw-r--r-- | arch/i386/kernel/irq.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c index 061533e0cb5e..16b491703967 100644 --- a/arch/i386/kernel/irq.c +++ b/arch/i386/kernel/irq.c @@ -53,13 +53,19 @@ static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly; */ fastcall unsigned int do_IRQ(struct pt_regs *regs) { - /* high bits used in ret_from_ code */ - int irq = regs->orig_eax & 0xff; + /* high bit used in ret_from_ code */ + int irq = ~regs->orig_eax; #ifdef CONFIG_4KSTACKS union irq_ctx *curctx, *irqctx; u32 *isp; #endif + if (unlikely((unsigned)irq >= NR_IRQS)) { + printk(KERN_EMERG "%s: cannot handle IRQ %d\n", + __FUNCTION__, irq); + BUG(); + } + irq_enter(); #ifdef CONFIG_DEBUG_STACKOVERFLOW /* Debugging check for stack overflow: is there less than 1KB free? */ @@ -76,6 +82,10 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs) } #endif + if (!irq_desc[irq].handle_irq) { + __do_IRQ(irq, regs); + goto out_exit; + } #ifdef CONFIG_4KSTACKS curctx = (union irq_ctx *) current_thread_info(); @@ -100,8 +110,8 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs) * softirq checks work in the hardirq context. */ irqctx->tinfo.preempt_count = - irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK | - curctx->tinfo.preempt_count & SOFTIRQ_MASK; + (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) | + (curctx->tinfo.preempt_count & SOFTIRQ_MASK); asm volatile( " xchgl %%ebx,%%esp \n" @@ -115,6 +125,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs) #endif __do_IRQ(irq, regs); +out_exit: irq_exit(); return 1; @@ -243,7 +254,7 @@ int show_interrupts(struct seq_file *p, void *v) for_each_online_cpu(j) seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); #endif - seq_printf(p, " %14s", irq_desc[i].handler->typename); + seq_printf(p, " %14s", irq_desc[i].chip->typename); seq_printf(p, " %s", action->name); for (action=action->next; action; action = action->next) @@ -285,13 +296,13 @@ void fixup_irqs(cpumask_t map) if (irq == 2) continue; - cpus_and(mask, irq_affinity[irq], map); + cpus_and(mask, irq_desc[irq].affinity, map); if (any_online_cpu(mask) == NR_CPUS) { printk("Breaking affinity for irq %i\n", irq); mask = map; } - if (irq_desc[irq].handler->set_affinity) - irq_desc[irq].handler->set_affinity(irq, mask); + if (irq_desc[irq].chip->set_affinity) + irq_desc[irq].chip->set_affinity(irq, mask); else if (irq_desc[irq].action && !(warned++)) printk("Cannot set affinity for irq %i\n", irq); } |