linux-kernel - [PATCH v4 6/8] irqdomain: Mark fwnodes when their irqdomain is added/removed

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Date:   Fri,  5 Feb 2021 14:26:42 -0800
From:   Saravana Kannan <saravanak@...gle.com>
To:     Jonathan Corbet <corbet@....net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Len Brown <len.brown@...el.com>, Len Brown <lenb@...nel.org>,
        Pavel Machek <pavel@....cz>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Marc Zyngier <maz@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Saravana Kannan <saravanak@...gle.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-acpi@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        kernel-team@...roid.com
Subject: [PATCH v4 6/8] irqdomain: Mark fwnodes when their irqdomain is added/removed

This allows fw_devlink to recognize irqdomain drivers that don't use the
device-driver model to initialize the device. fw_devlink will use this
information to make sure consumers of such irqdomain aren't indefinitely
blocked from probing, waiting for the irqdomain device to appear and
bind to a driver.

Signed-off-by: Saravana Kannan <saravanak@...gle.com>
---
 kernel/irq/irqdomain.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 6aacd342cd14..288151393a06 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -205,6 +205,7 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
 	}
 
 	fwnode_handle_get(fwnode);
+	fwnode_dev_initialized(fwnode, true);
 
 	/* Fill structure */
 	INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
@@ -253,6 +254,7 @@ void irq_domain_remove(struct irq_domain *domain)
 
 	pr_debug("Removed domain %s\n", domain->name);
 
+	fwnode_dev_initialized(domain->fwnode, false);
 	fwnode_handle_put(domain->fwnode);
 	if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
 		kfree(domain->name);
-- 
2.30.0.478.g8a0d178c01-goog