linux-kernel - [patch V2 05/33] genirq/msi: Split msi_create_irq

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Message-ID: <20221121091326.769133826@linutronix.de>
Date:   Mon, 21 Nov 2022 15:37:52 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>
Subject: [patch V2 05/33] 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@...utronix.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