genirq: Add generic_handle_domain_irq() helper
Provide generic_handle_domain_irq() as a pendent to handle_domain_irq()
for non-root interrupt controllers
Signed-off-by: Marc Zyngier <maz@kernel.org>
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 2971eb7..0f226c6 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -170,6 +170,8 @@ int generic_handle_irq(unsigned int irq);
int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq,
bool lookup, struct pt_regs *regs);
+int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq);
+
static inline int handle_domain_irq(struct irq_domain *domain,
unsigned int hwirq, struct pt_regs *regs)
{
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 684c5b7..6179d5b 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -661,7 +661,24 @@ EXPORT_SYMBOL_GPL(generic_handle_irq);
#ifdef CONFIG_HANDLE_DOMAIN_IRQ
/**
- * __handle_domain_irq - Invoke the handler for a HW irq belonging to a domain
+ * generic_handle_domain_irq - Invoke the handler for a HW irq belonging
+ * to a domain, usually for a non-root interrupt
+ * controller
+ * @domain: The domain where to perform the lookup
+ * @hwirq: The HW irq number to convert to a logical one
+ *
+ * Returns: 0 on success, or -EINVAL if conversion has failed
+ *
+ */
+int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq)
+{
+ return handle_irq_desc(irq_resolve_mapping(domain, hwirq));
+}
+EXPORT_SYMBOL_GPL(generic_handle_domain_irq);
+
+/**
+ * __handle_domain_irq - Invoke the handler for a HW irq belonging to a domain,
+ * usually for a root interrupt controller
* @domain: The domain where to perform the lookup
* @hwirq: The HW irq number to convert to a logical one
* @lookup: Whether to perform the domain lookup or not
