AuxXxilium/linux_dsm_epyc7002
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Merge branch 'irq/for-gpio' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into devel

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This commit is contained in:
Linus Walleij 2014-03-14 10:26:56 +01:00
commit a176973ee8
2 changed files with 33 additions and 1 deletions
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6
include/linux/irq.h
View File

@ -303,6 +303,10 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
* @irq_pm_shutdown: function called from core code on shutdown once per chip * @irq_pm_shutdown: function called from core code on shutdown once per chip
* @irq_calc_mask: Optional function to set irq_data.mask for special cases * @irq_calc_mask: Optional function to set irq_data.mask for special cases
* @irq_print_chip: optional to print special chip info in show_interrupts * @irq_print_chip: optional to print special chip info in show_interrupts
* @irq_request_resources: optional to request resources before calling
* any other callback related to this irq
* @irq_release_resources: optional to release resources acquired with
* irq_request_resources
* @flags: chip specific flags * @flags: chip specific flags
*/ */
struct irq_chip { struct irq_chip {
@ -336,6 +340,8 @@ struct irq_chip {
void (*irq_calc_mask)(struct irq_data *data); void (*irq_calc_mask)(struct irq_data *data);
void (*irq_print_chip)(struct irq_data *data, struct seq_file *p); void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
int (*irq_request_resources)(struct irq_data *data);
void (*irq_release_resources)(struct irq_data *data);
unsigned long flags; unsigned long flags;
}; };

28
kernel/irq/manage.c
View File

@ -896,6 +896,23 @@ static void irq_setup_forced_threading(struct irqaction *new)
} }
} }
static int irq_request_resources(struct irq_desc *desc)
{
struct irq_data *d = &desc->irq_data;
struct irq_chip *c = d->chip;
return c->irq_request_resources ? c->irq_request_resources(d) : 0;
}
static void irq_release_resources(struct irq_desc *desc)
{
struct irq_data *d = &desc->irq_data;
struct irq_chip *c = d->chip;
if (c->irq_release_resources)
c->irq_release_resources(d);
}
/* /*
* Internal function to register an irqaction - typically used to * Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture. * allocate special interrupts that are part of the architecture.
@ -1091,6 +1108,13 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
} }
if (!shared) { if (!shared) {
ret = irq_request_resources(desc);
if (ret) {
pr_err("Failed to request resources for %s (irq %d) on irqchip %s\n",
new->name, irq, desc->irq_data.chip->name);
goto out_mask;
}
init_waitqueue_head(&desc->wait_for_threads); init_waitqueue_head(&desc->wait_for_threads);
/* Setup the type (level, edge polarity) if configured: */ /* Setup the type (level, edge polarity) if configured: */
@ -1261,8 +1285,10 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
*action_ptr = action->next; *action_ptr = action->next;
/* If this was the last handler, shut down the IRQ line: */ /* If this was the last handler, shut down the IRQ line: */
if (!desc->action) if (!desc->action) {
irq_shutdown(desc); irq_shutdown(desc);
irq_release_resources(desc);
}
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
/* make sure affinity_hint is cleaned up */ /* make sure affinity_hint is cleaned up */