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genirq: Add chip flag for restricting cpu_on/offline calls

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Add a flag which indicates that the on/offline callback should only be
called on enabled interrupts.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-03-27 16:05:36 +02:00
parent 0fdb4b259e
commit b3d422329f
2 changed files with 9 additions and 4 deletions
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3
include/linux/irq.h
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@ -348,11 +348,14 @@ struct irq_chip {
* IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
* IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
* IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
* IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
* when irq enabled
*/
enum {
IRQCHIP_SET_TYPE_MASKED = (1 << 0),
IRQCHIP_EOI_IF_HANDLED = (1 << 1),
IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
};
/* This include will go away once we isolated irq_desc usage to core code */

10
kernel/irq/chip.c
View file

@ -718,8 +718,9 @@ void irq_cpu_online(void)
raw_spin_lock_irqsave(&desc->lock, flags);
chip = irq_data_get_irq_chip(&desc->irq_data);
if (chip && chip->irq_cpu_online)
if (chip && chip->irq_cpu_online &&
(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
!(desc->istate & IRQS_DISABLED)))
chip->irq_cpu_online(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
@ -747,8 +748,9 @@ void irq_cpu_offline(void)
raw_spin_lock_irqsave(&desc->lock, flags);
chip = irq_data_get_irq_chip(&desc->irq_data);
if (chip && chip->irq_cpu_offline)
if (chip && chip->irq_cpu_offline &&
(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
!(desc->istate & IRQS_DISABLED)))
chip->irq_cpu_offline(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);