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genirq: Consolidate startup/shutdown of interrupts

Browse source 
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: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.787481468@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-02 21:41:14 +00:00
parent 3b56f0585f
commit 4699923861
4 changed files with 33 additions and 31 deletions
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10
kernel/irq/autoprobe.c
View file

@ -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);
}

37
kernel/irq/chip.c
View file

@ -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);

3
kernel/irq/internals.h
View file

@ -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 :*/

14
kernel/irq/manage.c
View file

@ -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 */