linux-kernel - [RESEND PATCH] platform: goldfish: pipe: Use platform_get

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Message-Id: <20220309202327.16627-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Wed,  9 Mar 2022 20:23:27 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [RESEND PATCH] platform: goldfish: pipe: Use platform_get_irq() to get the interrupt

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
original patch [0].

[0] https://lore.kernel.org/lkml/20211224161334.31123-2-prabhakar.mahadev-lad.rj@bp.renesas.com/
---
 drivers/platform/goldfish/goldfish_pipe.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
index b67539f9848c..7737d56191d7 100644
--- a/drivers/platform/goldfish/goldfish_pipe.c
+++ b/drivers/platform/goldfish/goldfish_pipe.c
@@ -896,11 +896,9 @@ static int goldfish_pipe_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!r)
-		return -EINVAL;
-
-	dev->irq = r->start;
+	dev->irq = platform_get_irq(pdev, 0);
+	if (dev->irq < 0)
+		return dev->irq;
 
 	/*
 	 * Exchange the versions with the host device
-- 
2.17.1