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

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index ddc2f5427f75c57e09bc2e5ba9d655fa35c6e288..fe4d48ec5bc4a708c42246bbe3b16e437c4683ec 100644 (file)
--- 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,