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

[tip-bot for Thomas Gleixner]

Commit-ID:  f8409a6a4bf86e2d90ec8460df2874e4e19ebb27
Gitweb:     http://git.kernel.org/tip/f8409a6a4bf86e2d90ec8460df2874e4e19ebb27
Author:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 20 Jun 2017 01:37:09 +0200
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Link: http://lkml.kernel.org/r/20170619235443.907511074@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

---
 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;