linux-kernel - [tip:irq/core] x86/htirq: Create named domain

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Date:   Thu, 22 Jun 2017 09:44:00 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, keith.busch@...el.com,
        tglx@...utronix.de, axboe@...nel.dk, mingo@...nel.org,
        peterz@...radead.org, hch@....de, marc.zyngier@....com,
        mpe@...erman.id.au, hpa@...or.com
Subject: [tip:irq/core] x86/htirq: Create named domain

Commit-ID:  5f432711ba94400fb39e9be81913ced81c141758
Gitweb:     http://git.kernel.org/tip/5f432711ba94400fb39e9be81913ced81c141758
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 20 Jun 2017 01:37:08 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jun 2017 18:21:09 +0200

x86/htirq: Create named domain

Use the fwnode to create a named domain so diagnosis works.

Mark the init function __init while at it.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Keith Busch <keith.busch@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Christoph Hellwig <hch@....de>
Link: http://lkml.kernel.org/r/20170619235443.829047007@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 arch/x86/kernel/apic/htirq.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/apic/htirq.c b/arch/x86/kernel/apic/htirq.c
index ae50d34..56ccf93 100644
--- a/arch/x86/kernel/apic/htirq.c
+++ b/arch/x86/kernel/apic/htirq.c
@@ -150,16 +150,27 @@ static const struct irq_domain_ops htirq_domain_ops = {
 	.deactivate	= htirq_domain_deactivate,
 };
 
-void arch_init_htirq_domain(struct irq_domain *parent)
+void __init arch_init_htirq_domain(struct irq_domain *parent)
 {
+	struct fwnode_handle *fn;
+
 	if (disable_apic)
 		return;
 
-	htirq_domain = irq_domain_add_tree(NULL, &htirq_domain_ops, NULL);
+	fn = irq_domain_alloc_named_fwnode("PCI-HT");
+	if (!fn)
+		goto warn;
+
+	htirq_domain = irq_domain_create_tree(fn, &htirq_domain_ops, NULL);
+	irq_domain_free_fwnode(fn);
 	if (!htirq_domain)
-		pr_warn("failed to initialize irqdomain for HTIRQ.\n");
-	else
-		htirq_domain->parent = parent;
+		goto warn;
+
+	htirq_domain->parent = parent;
+	return;
+
+warn:
+	pr_warn("Failed to initialize irqdomain for HTIRQ.\n");
 }
 
 int arch_setup_ht_irq(int idx, int pos, struct pci_dev *dev,