TononixOS/ubports_kernel_google_msm
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] genirq: core

Browse Source 
Core genirq support: add the irq-chip and irq-flow abstractions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Thomas Gleixner
2006-06-29 02:24:51 -07:00
committed by Linus Torvalds
parent a34db9b28a
commit 6a6de9ef58
7 changed files with 182 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
kernel/irq/autoprobe.c
View File

@@ -40,8 +40,15 @@ unsigned long probe_irq_on(void)
desc = irq_desc + i;
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE))
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
/*
* Some chips need to know about probing in
* progress:
*/
if (desc->chip->set_type)
desc->chip->set_type(i, IRQ_TYPE_PROBE);
desc->chip->startup(i);
}
spin_unlock_irq(&desc->lock);
}

10
kernel/irq/handle.c
View File

@@ -18,6 +18,16 @@
#include "internals.h"
/**
* handle_bad_irq - handle spurious and unhandled irqs
*/
void fastcall
handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
{
kstat_this_cpu.irqs[irq]++;
ack_bad_irq(irq);
}
/*
* Linux has a controller-independent interrupt architecture.
* Every controller has a 'controller-template', that is used

6
kernel/irq/internals.h
View File

@@ -4,6 +4,12 @@
extern int noirqdebug;
/* Set default functions for irq_chip structures: */
extern void irq_chip_set_defaults(struct irq_chip *chip);
/* Set default handler: */
extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);

14
kernel/irq/manage.c
View File

@@ -153,6 +153,17 @@ int can_request_irq(unsigned int irq, unsigned long irqflags)
return !action;
}
void compat_irq_chip_set_default_handler(struct irq_desc *desc)
{
/*
* If the architecture still has not overriden
* the flow handler then zap the default. This
* should catch incorrect flow-type setting.
*/
if (desc->handle_irq == &handle_bad_irq)
desc->handle_irq = NULL;
}
/*
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
@@ -217,6 +228,9 @@ int setup_irq(unsigned int irq, struct irqaction *new)
desc->status |= IRQ_PER_CPU;
#endif
if (!shared) {
irq_chip_set_defaults(desc->chip);
compat_irq_chip_set_default_handler(desc);
desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
IRQ_INPROGRESS);

4
kernel/irq/resend.c
View File

@@ -37,9 +37,9 @@ static void resend_irqs(unsigned long arg)
irq = find_first_bit(irqs_resend, NR_IRQS);
clear_bit(irq, irqs_resend);
desc = irq_desc + irq;
spin_lock_irqsave(&desc->lock, flags);
local_irq_disable();
desc->handle_irq(irq, desc, NULL);
spin_unlock_irqrestore(&desc->lock, flags);
local_irq_enable();
}
}

1
kernel/irq/spurious.c
View File

@@ -168,6 +168,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
*/
printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
desc->status |= IRQ_DISABLED;
desc->depth = 1;
desc->chip->disable(irq);
}
desc->irqs_unhandled = 0;