Commit 801a0e9a authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Add irq disabled flag to irq_data state 



Some irq_chip implementation require to know the disabled state of the
interrupt in certain callbacks. Add a state flag and accessor to
irq_data.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent d72274e5

include/linux/irq.h

+8 −0
Original line number Diff line number Diff line
@@ -174,6 +174,8 @@ struct irq_data { 
 *				  from suspend

 * IRDQ_MOVE_PCNTXT		- Interrupt can be moved in process

 *				  context

 * IRQD_IRQ_DISABLED		- Some chip function need to know the

 *				  disabled state.

 */

enum {

	IRQD_TRIGGER_MASK		= 0xf,
@@ -184,6 +186,7 @@ enum { 
	IRQD_LEVEL			= (1 << 13),

	IRQD_WAKEUP_STATE		= (1 << 14),

	IRQD_MOVE_PCNTXT		= (1 << 15),

	IRQD_IRQ_DISABLED		= (1 << 16),

};



static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
@@ -235,6 +238,11 @@ static inline bool irqd_can_move_in_process_context(struct irq_data *d) 
	return d->state_use_accessors & IRQD_MOVE_PCNTXT;

}



static inline bool irqd_irq_disabled(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_IRQ_DISABLED;

}



/**

 * struct irq_chip - hardware interrupt chip descriptor

 *

kernel/irq/chip.c

+3 −2
Original line number Diff line number Diff line
@@ -141,12 +141,14 @@ EXPORT_SYMBOL_GPL(irq_get_irq_data); 
static void irq_state_clr_disabled(struct irq_desc *desc)

{

	desc->istate &= ~IRQS_DISABLED;

	irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);

	irq_compat_clr_disabled(desc);

}



static void irq_state_set_disabled(struct irq_desc *desc)

{

	desc->istate |= IRQS_DISABLED;

	irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);

	irq_compat_set_disabled(desc);

}
@@ -648,8 +650,7 @@ __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, 
	if (handle == handle_bad_irq) {

		if (desc->irq_data.chip != &no_irq_chip)

			mask_ack_irq(desc);

		irq_compat_set_disabled(desc);

		desc->istate |= IRQS_DISABLED;

		irq_state_set_disabled(desc);

		desc->depth = 1;

	}

	desc->handle_irq = handle;

kernel/irq/irqdesc.c

+1 −0
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node) 
	desc->irq_data.handler_data = NULL;

	desc->irq_data.msi_desc = NULL;

	irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);

	irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);

	desc->istate = IRQS_DISABLED;

	desc->handle_irq = handle_bad_irq;

	desc->depth = 1;