[patch V2 05/33] genirq/msi: Split msi_create_irq_domain()

Thomas Gleixner
2022-11-21T14:38:52Z

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

--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -796,17 +796,10 @@ static void msi_domain_update_chip_ops(s
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;

@@ -814,7 +807,7 @@ struct irq_domain *msi_create_irq_domain
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) {
@@ -827,6 +820,21 @@ struct irq_domain *msi_create_irq_domain
}

/**
+ * 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