From: Marc Zyngier <marc.zyngier@arm.com>
Date: Fri, 12 May 2017 12:55:37 +0100
Subject: genirq/msi: Populate the domain name if provided by the irqchip
Git-commit: a97b852b4d4c2f8c50cab13c71566639f9a1a990
Patch-mainline: v4.13-rc1
References: fate#326250

In order to ease debug, let's populate the domain name upfront, before any
MSI gets requested. This allows the domain to appear in the
irq_domain_mapping, and the user to easily find the expected data.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/20170512115538.10767-4-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 kernel/irq/msi.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index ddc2f5427f75..fe4d48ec5bc4 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -265,13 +265,19 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
 					 struct msi_domain_info *info,
 					 struct irq_domain *parent)
 {
+	struct irq_domain *domain;
+
 	if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
 		msi_domain_update_dom_ops(info);
 	if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
 		msi_domain_update_chip_ops(info);
 
-	return irq_domain_create_hierarchy(parent, IRQ_DOMAIN_FLAG_MSI, 0,
-					   fwnode, &msi_domain_ops, info);
+	domain = irq_domain_create_hierarchy(parent, IRQ_DOMAIN_FLAG_MSI, 0,
+					     fwnode, &msi_domain_ops, info);
+	if (domain && info->chip && info->chip->name)
+		domain->name = info->chip->name;
+
+	return domain;
 }
 
 int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
-- 
2.19.1