linux-kernel - [PATCH 01/13] media: vsp1: Use platform_get

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Date:   Thu, 23 Dec 2021 17:30:02 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     linux-media@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        linux-renesas-soc@...r.kernel.org,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 01/13] media: vsp1: 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>
---
 drivers/media/platform/vsp1/vsp1_drv.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/vsp1/vsp1_drv.c b/drivers/media/platform/vsp1/vsp1_drv.c
index c9044785b903..bbba91a65a0f 100644
--- a/drivers/media/platform/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/vsp1/vsp1_drv.c
@@ -794,7 +794,6 @@ static int vsp1_probe(struct platform_device *pdev)
 {
 	struct vsp1_device *vsp1;
 	struct device_node *fcp_node;
-	struct resource *irq;
 	unsigned int i;
 	int ret;
 
@@ -813,14 +812,12 @@ static int vsp1_probe(struct platform_device *pdev)
 	if (IS_ERR(vsp1->mmio))
 		return PTR_ERR(vsp1->mmio);
 
-	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!irq) {
-		dev_err(&pdev->dev, "missing IRQ\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
 
-	ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
-			      IRQF_SHARED, dev_name(&pdev->dev), vsp1);
+	ret = devm_request_irq(&pdev->dev, ret, vsp1_irq_handler,
+			       IRQF_SHARED, dev_name(&pdev->dev), vsp1);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to request IRQ\n");
 		return ret;
-- 
2.17.1