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From:   cgel.zte@gmail.com
To:     linux@dominikbrodowski.net
Cc:     f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Minghao Chi <chi.minghao@zte.com.cn>,
        Zeal Robot <zealci@zte.com.cn>
Subject: [PATCH] pcmcia: Use platform_get_irq() to get the interrupt
Date:   Wed,  9 Mar 2022 05:37:32 +0000
Message-Id: <20220309053732.2081252-1-chi.minghao@zte.com.cn>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Minghao Chi <chi.minghao@zte.com.cn>

It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
for requesting IRQ's resources any more, as they can be not ready yet in
case of DT-booting.

platform_get_irq() instead is a recommended way for getting IRQ even if
it was not retrieved earlier.

It also makes code simpler because we're getting "int" value right away
and no conversion from resource to int is required.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
---
 drivers/pcmcia/bcm63xx_pcmcia.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/pcmcia/bcm63xx_pcmcia.c b/drivers/pcmcia/bcm63xx_pcmcia.c
index 16f573173471..bb06311d0b5f 100644
--- a/drivers/pcmcia/bcm63xx_pcmcia.c
+++ b/drivers/pcmcia/bcm63xx_pcmcia.c
@@ -327,10 +327,11 @@ static int bcm63xx_drv_pcmcia_probe(struct platform_device *pdev)
 {
 	struct bcm63xx_pcmcia_socket *skt;
 	struct pcmcia_socket *sock;
-	struct resource *res, *irq_res;
+	struct resource *res;
 	unsigned int regmem_size = 0, iomem_size = 0;
 	u32 val;
 	int ret;
+	int irq;
 
 	skt = kzalloc(sizeof(*skt), GFP_KERNEL);
 	if (!skt)
@@ -342,9 +343,9 @@ static int bcm63xx_drv_pcmcia_probe(struct platform_device *pdev)
 	/* make sure we have all resources we need */
 	skt->common_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	skt->attr_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	irq = platform_get_irq(pdev, 0);
 	skt->pd = pdev->dev.platform_data;
-	if (!skt->common_res || !skt->attr_res || !irq_res || !skt->pd) {
+	if (!skt->common_res || !skt->attr_res || (irq < 0) || !skt->pd) {
 		ret = -EINVAL;
 		goto err;
 	}
@@ -380,7 +381,7 @@ static int bcm63xx_drv_pcmcia_probe(struct platform_device *pdev)
 	sock->dev.parent = &pdev->dev;
 	sock->features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
 	sock->io_offset = (unsigned long)skt->io_base;
-	sock->pci_irq = irq_res->start;
+	sock->pci_irq = irq;
 
 #ifdef CONFIG_CARDBUS
 	sock->cb_dev = bcm63xx_cb_dev;
-- 
2.25.1