mtd: onenand: Check for error irq

[ Upstream commit 3e68f331c8c759c0daa31cc92c3449b23119a215 ]

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: 2c22120fbd01 ("MTD: OneNAND: interrupt based wait support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220104162658.1988142-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/mtd/nand/onenand/generic.c b/drivers/mtd/nand/onenand/generic.c
index 8b6f4da..a4b8b65 100644 (file)
--- 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;