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Commit 46999238 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Consolidate startup/shutdown of interrupts 



Aside of duplicated code some of the startup/shutdown sites do not
handle the MASKED/DISABLED flags and the depth field at all. Move that
to a helper function and take care of it there.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.787481468@linutronix.de>
parent 3b56f058

kernel/irq/autoprobe.c

+5 −5
Original line number Diff line number Diff line
@@ -60,7 +60,7 @@ unsigned long probe_irq_on(void) 
			if (desc->irq_data.chip->irq_set_type)

				desc->irq_data.chip->irq_set_type(&desc->irq_data,

							 IRQ_TYPE_PROBE);

			desc->irq_data.chip->irq_startup(&desc->irq_data);

			irq_startup(desc);

		}

		raw_spin_unlock_irq(&desc->lock);

	}
@@ -77,7 +77,7 @@ unsigned long probe_irq_on(void) 
		raw_spin_lock_irq(&desc->lock);

		if (!desc->action && !(desc->status & IRQ_NOPROBE)) {

			desc->status |= IRQ_AUTODETECT | IRQ_WAITING;

			if (desc->irq_data.chip->irq_startup(&desc->irq_data))

			if (irq_startup(desc))

				desc->status |= IRQ_PENDING;

		}

		raw_spin_unlock_irq(&desc->lock);
@@ -99,7 +99,7 @@ unsigned long probe_irq_on(void) 
			/* It triggered already - consider it spurious. */

			if (!(status & IRQ_WAITING)) {

				desc->status = status & ~IRQ_AUTODETECT;

				desc->irq_data.chip->irq_shutdown(&desc->irq_data);

				irq_shutdown(desc);

			} else

				if (i < 32)

					mask |= 1 << i;
@@ -138,7 +138,7 @@ unsigned int probe_irq_mask(unsigned long val) 
				mask |= 1 << i;



			desc->status = status & ~IRQ_AUTODETECT;

			desc->irq_data.chip->irq_shutdown(&desc->irq_data);

			irq_shutdown(desc);

		}

		raw_spin_unlock_irq(&desc->lock);

	}
@@ -182,7 +182,7 @@ int probe_irq_off(unsigned long val) 
				nr_of_irqs++;

			}

			desc->status = status & ~IRQ_AUTODETECT;

			desc->irq_data.chip->irq_shutdown(&desc->irq_data);

			irq_shutdown(desc);

		}

		raw_spin_unlock_irq(&desc->lock);

	}

kernel/irq/chip.c

+20 −17
Original line number Diff line number Diff line
@@ -192,6 +192,25 @@ void set_irq_nested_thread(unsigned int irq, int nest) 
}

EXPORT_SYMBOL_GPL(set_irq_nested_thread);



int irq_startup(struct irq_desc *desc)

{

	desc->status &= ~(IRQ_MASKED | IRQ_DISABLED);

	desc->depth = 0;



	if (desc->irq_data.chip->irq_startup)

		return desc->irq_data.chip->irq_startup(&desc->irq_data);



	desc->irq_data.chip->irq_enable(&desc->irq_data);

	return 0;

}



void irq_shutdown(struct irq_desc *desc)

{

	desc->status |= IRQ_MASKED | IRQ_DISABLED;

	desc->depth = 1;

	desc->irq_data.chip->irq_shutdown(&desc->irq_data);

}



/*

 * default enable function

 */
@@ -210,17 +229,6 @@ static void default_disable(struct irq_data *data) 
{

}



/*

 * default startup function

 */

static unsigned int default_startup(struct irq_data *data)

{

	struct irq_desc *desc = irq_data_to_desc(data);



	desc->irq_data.chip->irq_enable(data);

	return 0;

}



/*

 * default shutdown function

 */
@@ -229,7 +237,6 @@ static void default_shutdown(struct irq_data *data) 
	struct irq_desc *desc = irq_data_to_desc(data);



	desc->irq_data.chip->irq_mask(&desc->irq_data);

	desc->status |= IRQ_MASKED;

}



#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
@@ -337,8 +344,6 @@ void irq_chip_set_defaults(struct irq_chip *chip) 
		chip->irq_enable = default_enable;

	if (!chip->irq_disable)

		chip->irq_disable = default_disable;

	if (!chip->irq_startup)

		chip->irq_startup = default_startup;

	/*

	 * We use chip->irq_disable, when the user provided its own. When

	 * we have default_disable set for chip->irq_disable, then we need
@@ -747,10 +752,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, 
	desc->name = name;



	if (handle != handle_bad_irq && is_chained) {

		desc->status &= ~IRQ_DISABLED;

		desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;

		desc->depth = 0;

		desc->irq_data.chip->irq_startup(&desc->irq_data);

		irq_startup(desc);

	}

	raw_spin_unlock_irqrestore(&desc->lock, flags);

	chip_bus_sync_unlock(desc);

kernel/irq/internals.h

+3 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 
extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);

extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);



extern int irq_startup(struct irq_desc *desc);

extern void irq_shutdown(struct irq_desc *desc);



extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);



/* Resending of interrupts :*/

kernel/irq/manage.c

+5 −9
Original line number Diff line number Diff line
@@ -906,11 +906,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) 
		if (new->flags & IRQF_ONESHOT)

			desc->status |= IRQ_ONESHOT;



		if (!(desc->status & IRQ_NOAUTOEN)) {

			desc->depth = 0;

			desc->status &= ~IRQ_DISABLED;

			desc->irq_data.chip->irq_startup(&desc->irq_data);

		} else

		if (!(desc->status & IRQ_NOAUTOEN))

			irq_startup(desc);

		else

			/* Undo nested disables: */

			desc->depth = 1;
@@ -1055,10 +1053,8 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) 
#endif



	/* If this was the last handler, shut down the IRQ line: */

	if (!desc->action) {

		desc->status |= IRQ_DISABLED;

		desc->irq_data.chip->irq_shutdown(&desc->irq_data);

	}

	if (!desc->action)

		irq_shutdown(desc);



#ifdef CONFIG_SMP

	/* make sure affinity_hint is cleaned up */