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

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Date:   Thu, 22 Jun 2017 09:44:35 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     keith.busch@...el.com, axboe@...nel.dk, hpa@...or.com,
        peterz@...radead.org, mingo@...nel.org, hch@....de,
        tglx@...utronix.de, linux-kernel@...r.kernel.org,
        mpe@...erman.id.au, marc.zyngier@....com
Subject: [tip:irq/core] x86/uv: Create named irq domain

Commit-ID:  f8409a6a4bf86e2d90ec8460df2874e4e19ebb27
Gitweb:     http://git.kernel.org/tip/f8409a6a4bf86e2d90ec8460df2874e4e19ebb27
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 20 Jun 2017 01:37:09 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jun 2017 18:21:10 +0200

x86/uv: Create named irq domain

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

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/20170619235443.907511074@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 arch/x86/platform/uv/uv_irq.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
index 776c659..03fc397 100644
--- a/arch/x86/platform/uv/uv_irq.c
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -160,13 +160,21 @@ static struct irq_domain *uv_get_irq_domain(void)
 {
 	static struct irq_domain *uv_domain;
 	static DEFINE_MUTEX(uv_lock);
+	struct fwnode_handle *fn;
 
 	mutex_lock(&uv_lock);
-	if (uv_domain == NULL) {
-		uv_domain = irq_domain_add_tree(NULL, &uv_domain_ops, NULL);
-		if (uv_domain)
-			uv_domain->parent = x86_vector_domain;
-	}
+	if (uv_domain)
+		goto out;
+
+	fn = irq_domain_alloc_named_fwnode("UV-CORE");
+	if (!fn)
+		goto out;
+
+	uv_domain = irq_domain_create_tree(fn, &uv_domain_ops, NULL);
+	irq_domain_free_fwnode(fn);
+	if (uv_domain)
+		uv_domain->parent = x86_vector_domain;
+out:
 	mutex_unlock(&uv_lock);
 
 	return uv_domain;