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genirq: fix the affinity setting in setup_irq
The affinity setting in setup irq is called before the NO_BALANCING flag is checked and might therefore override affinity settings from the calling code with the default setting. Move the NO_BALANCING flag check before the call to the affinity setting. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -123,7 +123,7 @@ int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
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* Preserve an userspace affinity setup, but make sure that
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* one of the targets is online.
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*/
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if (desc->status & IRQ_AFFINITY_SET) {
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if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
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if (cpus_intersects(desc->affinity, cpu_online_map))
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mask = desc->affinity;
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else
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@ -483,6 +483,10 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
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/* Undo nested disables: */
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desc->depth = 1;
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/* Exclude IRQ from balancing if requested */
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if (new->flags & IRQF_NOBALANCING)
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desc->status |= IRQ_NO_BALANCING;
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/* Set default affinity mask once everything is setup */
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do_irq_select_affinity(irq, desc);
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@ -497,10 +501,6 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
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*p = new;
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/* Exclude IRQ from balancing */
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if (new->flags & IRQF_NOBALANCING)
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desc->status |= IRQ_NO_BALANCING;
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/* Reset broken irq detection when installing new handler */
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desc->irq_count = 0;
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desc->irqs_unhandled = 0;
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