linux-kernel - [PATCH] spi: sifive: check return value for platform_get

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Message-ID: <20190917091207.4925-1-mail@aurabindo.in>
Date:   Tue, 17 Sep 2019 09:12:14 +0000
From:   Aurabindo Jayamohanan <mail@...abindo.in>
To:     broonie@...nel.org, palmer@...ive.com, paul.walmsley@...ive.com
Cc:     linux-spi@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] spi: sifive: check return value for platform_get_resource()

platform_get_resource() may return NULL. If it is so, return -ENXIO

Signed-off-by: Aurabindo Jayamohanan <mail@...abindo.in>
---
 drivers/spi/spi-sifive.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/spi/spi-sifive.c b/drivers/spi/spi-sifive.c
index 93ec2c6cdbfd..67485067a694 100644
--- a/drivers/spi/spi-sifive.c
+++ b/drivers/spi/spi-sifive.c
@@ -308,6 +308,12 @@ static int sifive_spi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, master);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "no IOMEM resource found\n");
+		ret = -ENXIO;
+		goto put_master;
+	}
+
 	spi->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(spi->regs)) {
 		ret = PTR_ERR(spi->regs);
-- 
2.23.0