[tip: irq/core] genirq/msi: Split msi_create_irq_domain()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     a80c0aceeaffdb3afe9536fe747480e85841da7f
Gitweb:        https://git.kernel.org/tip/a80c0aceeaffdb3afe9536fe747480e85841da7f
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Fri, 25 Nov 2022 00:25:52 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Mon, 05 Dec 2022 19:21:01 +01:00

genirq/msi: Split msi_create_irq_domain()

Split the functionality of msi_create_irq_domain() so it can
be reused for creating per device irq domains.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Acked-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221124232325.559086358@xxxxxxxxxxxxx

---
 kernel/irq/msi.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 0a38905..0f7fe56 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -758,17 +758,10 @@ static void msi_domain_update_chip_ops(struct msi_domain_info *info)
 		chip->irq_set_affinity = msi_domain_set_affinity;
 }
 
-/**
- * msi_create_irq_domain - Create an MSI interrupt domain
- * @fwnode:	Optional fwnode of the interrupt controller
- * @info:	MSI domain info
- * @parent:	Parent irq domain
- *
- * Return: pointer to the created &struct irq_domain or %NULL on failure
- */
-struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
-					 struct msi_domain_info *info,
-					 struct irq_domain *parent)
+static struct irq_domain *__msi_create_irq_domain(struct fwnode_handle *fwnode,
+						  struct msi_domain_info *info,
+						  unsigned int flags,
+						  struct irq_domain *parent)
 {
 	struct irq_domain *domain;
 
@@ -787,7 +780,7 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
 	if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
 		msi_domain_update_chip_ops(info);
 
-	domain = irq_domain_create_hierarchy(parent, IRQ_DOMAIN_FLAG_MSI, 0,
+	domain = irq_domain_create_hierarchy(parent, flags | IRQ_DOMAIN_FLAG_MSI, 0,
 					     fwnode, &msi_domain_ops, info);
 
 	if (domain) {
@@ -800,6 +793,21 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
 }
 
 /**
+ * msi_create_irq_domain - Create an MSI interrupt domain
+ * @fwnode:	Optional fwnode of the interrupt controller
+ * @info:	MSI domain info
+ * @parent:	Parent irq domain
+ *
+ * Return: pointer to the created &struct irq_domain or %NULL on failure
+ */
+struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
+					 struct msi_domain_info *info,
+					 struct irq_domain *parent)
+{
+	return __msi_create_irq_domain(fwnode, info, 0, parent);
+}
+
+/**
  * msi_parent_init_dev_msi_info - Delegate initialization of device MSI info down
  *				  in the domain hierarchy
  * @dev:		The device for which the domain should be created