forked from luck/tmp_suning_uos_patched
powerpc/mpic: Fix problem that affinity is not updated
Since commit 57b150cce8
, desc->affinity
of an irq is changed after calling desc->chip->set_affinity.
Therefore we need to fix the irq_choose_cpu() not to depend on the
desc->affinity for new mask.
Signed-off-by: Jiajun Wu <b06378@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
a1128f8f0f
commit
38e1313fc7
@ -567,13 +567,11 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
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#endif /* CONFIG_MPIC_U3_HT_IRQS */
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#ifdef CONFIG_SMP
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static int irq_choose_cpu(unsigned int virt_irq)
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static int irq_choose_cpu(const cpumask_t *mask)
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{
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cpumask_t mask;
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int cpuid;
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cpumask_copy(&mask, irq_to_desc(virt_irq)->affinity);
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if (cpus_equal(mask, CPU_MASK_ALL)) {
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if (cpumask_equal(mask, cpu_all_mask)) {
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static int irq_rover;
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static DEFINE_SPINLOCK(irq_rover_lock);
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unsigned long flags;
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@ -594,20 +592,15 @@ static int irq_choose_cpu(unsigned int virt_irq)
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spin_unlock_irqrestore(&irq_rover_lock, flags);
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} else {
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cpumask_t tmp;
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cpus_and(tmp, cpu_online_map, mask);
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if (cpus_empty(tmp))
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cpuid = cpumask_first_and(mask, cpu_online_mask);
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if (cpuid >= nr_cpu_ids)
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goto do_round_robin;
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cpuid = first_cpu(tmp);
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}
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return get_hard_smp_processor_id(cpuid);
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}
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#else
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static int irq_choose_cpu(unsigned int virt_irq)
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static int irq_choose_cpu(const cpumask_t *mask)
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{
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return hard_smp_processor_id();
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}
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@ -816,7 +809,7 @@ int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
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unsigned int src = mpic_irq_to_hw(irq);
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if (mpic->flags & MPIC_SINGLE_DEST_CPU) {
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int cpuid = irq_choose_cpu(irq);
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int cpuid = irq_choose_cpu(cpumask);
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mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
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} else {
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