From: Marc Zyngier <maz@kernel.org>
Date: Wed, 12 May 2021 12:45:52 +0000 (+0100)
Subject: genirq: Add generic_handle_domain_irq() helper
X-Git-Tag: v5.15~729^2^2~3^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8240ef50d4864325b346e40bb9d30cda9f22102d;p=platform%2Fkernel%2Flinux-starfive.git

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