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Diffstat (limited to 'kernel/irq/irqdomain.c')
-rw-r--r--kernel/irq/irqdomain.c60
1 files changed, 36 insertions, 24 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index ac4644e92b49..4f4f60015e8a 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -21,7 +21,6 @@
static LIST_HEAD(irq_domain_list);
static DEFINE_MUTEX(irq_domain_mutex);
-static DEFINE_MUTEX(revmap_trees_mutex);
static struct irq_domain *irq_default_domain;
static void irq_domain_check_hierarchy(struct irq_domain *domain);
@@ -211,6 +210,7 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
/* Fill structure */
INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
+ mutex_init(&domain->revmap_tree_mutex);
domain->ops = ops;
domain->host_data = host_data;
domain->hwirq_max = hwirq_max;
@@ -462,9 +462,9 @@ static void irq_domain_clear_mapping(struct irq_domain *domain,
if (hwirq < domain->revmap_size) {
domain->linear_revmap[hwirq] = 0;
} else {
- mutex_lock(&revmap_trees_mutex);
+ mutex_lock(&domain->revmap_tree_mutex);
radix_tree_delete(&domain->revmap_tree, hwirq);
- mutex_unlock(&revmap_trees_mutex);
+ mutex_unlock(&domain->revmap_tree_mutex);
}
}
@@ -475,9 +475,9 @@ static void irq_domain_set_mapping(struct irq_domain *domain,
if (hwirq < domain->revmap_size) {
domain->linear_revmap[hwirq] = irq_data->irq;
} else {
- mutex_lock(&revmap_trees_mutex);
+ mutex_lock(&domain->revmap_tree_mutex);
radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
- mutex_unlock(&revmap_trees_mutex);
+ mutex_unlock(&domain->revmap_tree_mutex);
}
}
@@ -921,8 +921,7 @@ static void virq_debug_show_one(struct seq_file *m, struct irq_desc *desc)
chip = irq_data_get_irq_chip(data);
seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
- seq_printf(m, data ? "0x%p " : " %p ",
- irq_data_get_irq_chip_data(data));
+ seq_printf(m, "0x%p ", irq_data_get_irq_chip_data(data));
seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
direct = (irq == hwirq) && (irq < domain->revmap_direct_max_irq);
@@ -1459,11 +1458,11 @@ static void irq_domain_fix_revmap(struct irq_data *d)
return; /* Not using radix tree. */
/* Fix up the revmap. */
- mutex_lock(&revmap_trees_mutex);
+ mutex_lock(&d->domain->revmap_tree_mutex);
slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
if (slot)
radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
- mutex_unlock(&revmap_trees_mutex);
+ mutex_unlock(&d->domain->revmap_tree_mutex);
}
/**
@@ -1682,28 +1681,36 @@ void irq_domain_free_irqs_parent(struct irq_domain *domain,
}
EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
-static void __irq_domain_activate_irq(struct irq_data *irq_data)
+static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
{
if (irq_data && irq_data->domain) {
struct irq_domain *domain = irq_data->domain;
+ if (domain->ops->deactivate)
+ domain->ops->deactivate(domain, irq_data);
if (irq_data->parent_data)
- __irq_domain_activate_irq(irq_data->parent_data);
- if (domain->ops->activate)
- domain->ops->activate(domain, irq_data);
+ __irq_domain_deactivate_irq(irq_data->parent_data);
}
}
-static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
+static int __irq_domain_activate_irq(struct irq_data *irqd, bool early)
{
- if (irq_data && irq_data->domain) {
- struct irq_domain *domain = irq_data->domain;
+ int ret = 0;
- if (domain->ops->deactivate)
- domain->ops->deactivate(domain, irq_data);
- if (irq_data->parent_data)
- __irq_domain_deactivate_irq(irq_data->parent_data);
+ if (irqd && irqd->domain) {
+ struct irq_domain *domain = irqd->domain;
+
+ if (irqd->parent_data)
+ ret = __irq_domain_activate_irq(irqd->parent_data,
+ early);
+ if (!ret && domain->ops->activate) {
+ ret = domain->ops->activate(domain, irqd, early);
+ /* Rollback in case of error */
+ if (ret && irqd->parent_data)
+ __irq_domain_deactivate_irq(irqd->parent_data);
+ }
}
+ return ret;
}
/**
@@ -1714,12 +1721,15 @@ static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
* This is the second step to call domain_ops->activate to program interrupt
* controllers, so the interrupt could actually get delivered.
*/
-void irq_domain_activate_irq(struct irq_data *irq_data)
+int irq_domain_activate_irq(struct irq_data *irq_data, bool early)
{
- if (!irqd_is_activated(irq_data)) {
- __irq_domain_activate_irq(irq_data);
+ int ret = 0;
+
+ if (!irqd_is_activated(irq_data))
+ ret = __irq_domain_activate_irq(irq_data, early);
+ if (!ret)
irqd_set_activated(irq_data);
- }
+ return ret;
}
/**
@@ -1810,6 +1820,8 @@ irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
d->revmap_size + d->revmap_direct_max_irq);
seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
+ if (d->ops && d->ops->debug_show)
+ d->ops->debug_show(m, d, NULL, ind + 1);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
if (!d->parent)
return;