linux/arch/ia64/hp/sim/hpsim_irq.c
Jiri Slaby 6efb6b77ff hpsim, initialize chip for assigned irqs
Currently, when assign_irq_vector is called and the irq connected in
the simulator, the irq is not ready. request_irq will return ENOSYS
immediately. It is because the irq chip is unset.

Hence set the chip properly to irq_type_hp_sim. And make sure this is
done from both users of simulated interrupts.

Also we have to set handler here, otherwise we end up in
handle_bad_int resulting in spam in logs and no irqs handled. We use
handle_simple_irq as these are SW interrupts that need no ACK or
anything.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-08 12:26:30 -08:00

76 lines
1.3 KiB
C

/*
* Platform dependent support for HP simulator.
*
* Copyright (C) 1998-2001 Hewlett-Packard Co
* Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/irq.h>
#include "hpsim_ssc.h"
static unsigned int
hpsim_irq_startup(struct irq_data *data)
{
return 0;
}
static void
hpsim_irq_noop(struct irq_data *data)
{
}
static int
hpsim_set_affinity_noop(struct irq_data *d, const struct cpumask *b, bool f)
{
return 0;
}
static struct irq_chip irq_type_hp_sim = {
.name = "hpsim",
.irq_startup = hpsim_irq_startup,
.irq_shutdown = hpsim_irq_noop,
.irq_enable = hpsim_irq_noop,
.irq_disable = hpsim_irq_noop,
.irq_ack = hpsim_irq_noop,
.irq_set_affinity = hpsim_set_affinity_noop,
};
static void hpsim_irq_set_chip(int irq)
{
struct irq_chip *chip = irq_get_chip(irq);
if (chip == &no_irq_chip)
irq_set_chip(irq, &irq_type_hp_sim);
}
static void hpsim_connect_irq(int intr, int irq)
{
ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
}
int hpsim_get_irq(int intr)
{
int irq = assign_irq_vector(AUTO_ASSIGN);
if (irq >= 0) {
hpsim_irq_set_chip(irq);
irq_set_handler(irq, handle_simple_irq);
hpsim_connect_irq(intr, irq);
}
return irq;
}
void __init
hpsim_irq_init (void)
{
int i;
for_each_active_irq(i)
hpsim_irq_set_chip(i);
}