Mailing List Archive

This is a version of irq_create_of_mapping() that propagates the precise
error code instead of returning 0 for all errors. It will be used in
subsequent patches to allow further propagation of error codes.

To avoid code duplication, implement irq_create_of_mapping() as a
wrapper around the new __irq_create_of_mapping().

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
include/linux/of_irq.h | 3 +++
kernel/irq/irqdomain.c | 39 +++++++++++++++++++++++++++++----------
2 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index 535cecf..c383dd1 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -63,6 +63,9 @@ extern int of_irq_map_raw(struct device_node *parent, const __be32 *intspec,
struct of_irq *out_irq);
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
+extern int __irq_create_of_mapping(struct device_node *controller,
+ const u32 *intspec, unsigned int intsize,
+ unsigned int *virqp);
extern unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec,
unsigned int intsize);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index d2a3b01..9867616 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -484,39 +484,58 @@ int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
}
EXPORT_SYMBOL_GPL(irq_create_strict_mappings);

-unsigned int irq_create_of_mapping(struct device_node *controller,
- const u32 *intspec, unsigned int intsize)
+int __irq_create_of_mapping(struct device_node *controller, const u32 *intspec,
+ unsigned int intsize, unsigned int *virqp)
{
+ unsigned int type = IRQ_TYPE_NONE;
struct irq_domain *domain;
irq_hw_number_t hwirq;
- unsigned int type = IRQ_TYPE_NONE;
unsigned int virq;
+ int ret;

domain = controller ? irq_find_host(controller) : irq_default_domain;
if (!domain) {
pr_warn("no irq domain found for %s !\n",
of_node_full_name(controller));
- return 0;
+ return -EPROBE_DEFER;
}

/* If domain has no translation, then we assume interrupt line */
if (domain->ops->xlate == NULL)
hwirq = intspec[0];
else {
- if (domain->ops->xlate(domain, controller, intspec, intsize,
- &hwirq, &type))
- return 0;
+ ret = domain->ops->xlate(domain, controller, intspec, intsize,
+ &hwirq, &type);
+ if (ret)
+ return ret;
}

/* Create mapping */
- virq = irq_create_mapping(domain, hwirq);
- if (!virq)
- return virq;
+ ret = __irq_create_mapping(domain, hwirq, &virq);
+ if (ret)
+ return ret;

/* Set type if specified and different than the current one */
if (type != IRQ_TYPE_NONE &&
type != irq_get_trigger_type(virq))
irq_set_irq_type(virq, type);
+
+ if (virqp)
+ *virqp = virq;
+
+ return 0;
+}
+
+unsigned int irq_create_of_mapping(struct device_node *controller,
+ const u32 *intspec, unsigned int intsize)
+{
+ unsigned int virq;
+ int ret;
+
+ ret = __irq_create_of_mapping(controller, intspec, intsize, &virq);
+ if (ret)
+ return 0;
+
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);
--
1.8.4

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