Commit b3d42232 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Add chip flag for restricting cpu_on/offline calls 



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

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0fdb4b25

include/linux/irq.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */

kernel/irq/chip.c

+6 −4
Original line number Diff line number Diff line
@@ -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);