netdev - [PATCH 4/8] net: ethoc: Use platform_get

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Message-Id: <20211224192626.15843-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Fri, 24 Dec 2021 19:26:22 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
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: [PATCH 4/8] net: ethoc: 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/net/ethernet/ethoc.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index d618a8b785b0..437c5acfe222 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -1078,14 +1078,11 @@ static int ethoc_probe(struct platform_device *pdev)
 
 
 	/* obtain device IRQ number */
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "cannot obtain IRQ\n");
-		ret = -ENXIO;
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
 		goto free;
-	}
 
-	netdev->irq = res->start;
+	netdev->irq = ret;
 
 	/* setup driver-private data */
 	priv = netdev_priv(netdev);
-- 
2.17.1