From:   Jiasheng Jiang <jiasheng@iscas.ac.cn>
To:     kyungmin.park@samsung.com, miquel.raynal@bootlin.com,
        richard@nod.at, vigneshr@ti.com
Cc:     linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
        Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH] mtd: onenand: Check for error irq
Date:   Fri, 24 Dec 2021 10:23:21 +0800
Message-Id: <20211224022321.1470969-1-jiasheng@iscas.ac.cn>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

For the possible failure of the platform_get_irq(), the returned irq
could be error number and will finally cause the failure of the
request_irq().
Consider that platform_get_irq() can now in certain cases return
-EPROBE_DEFER, and the consequences of letting request_irq() effectively
convert that into -EINVAL, even at probe time rather than later on.
So it might be better to check just now.

Fixes: 26777d37216c ("mtd: Move onenand code base to drivers/mtd/nand/onenand")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 drivers/mtd/nand/onenand/generic.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/onenand/generic.c b/drivers/mtd/nand/onenand/generic.c
index 8b6f4da5d720..a4b8b65fe15f 100644
--- a/drivers/mtd/nand/onenand/generic.c
+++ b/drivers/mtd/nand/onenand/generic.c
@@ -53,7 +53,12 @@ static int generic_onenand_probe(struct platform_device *pdev)
 	}
 
 	info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
-	info->onenand.irq = platform_get_irq(pdev, 0);
+
+	err = platform_get_irq(pdev, 0);
+	if (err < 0)
+		goto out_iounmap;
+
+	info->onenand.irq = err;
 
 	info->mtd.dev.parent = &pdev->dev;
 	info->mtd.priv = &info->onenand;
-- 
2.25.1