linux-kernel - [tip:irq/core] genirq/msi: Populate the domain name if provided by the irqchip

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Date:   Mon, 22 May 2017 13:35:06 -0700
From:   tip-bot for Marc Zyngier <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, marc.zyngier@....com
Subject: [tip:irq/core] genirq/msi: Populate the domain name if provided by
 the irqchip

Commit-ID:  a97b852b4d4c2f8c50cab13c71566639f9a1a990
Gitweb:     http://git.kernel.org/tip/a97b852b4d4c2f8c50cab13c71566639f9a1a990
Author:     Marc Zyngier <marc.zyngier@....com>
AuthorDate: Fri, 12 May 2017 12:55:37 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 22 May 2017 22:29:45 +0200

genirq/msi: Populate the domain name if provided by the irqchip

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@....com>
Link: http://lkml.kernel.org/r/20170512115538.10767-4-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 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 ddc2f54..fe4d48e 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,