linux-kernel - [PATCH -next] ata: palmld: fix return value check in palmld_pata

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Date:   Sun, 24 Apr 2022 17:34:20 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>
CC:     <damien.lemoal@...nsource.wdc.com>, <arnd@...db.de>,
        <b.zolnierkie@...sung.com>, <robert.jarzmik@...e.fr>
Subject: [PATCH -next] ata: palmld: fix return value check in palmld_pata_probe()

If devm_platform_ioremap_resource() fails, it never return
NULL pointer, replace the check with IS_ERR().

Fixes: 57bf0f5a162d ("ARM: pxa: use pdev resource for palmld mmio")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/ata/pata_palmld.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
index 400e65190904..51caa2a427dd 100644
--- a/drivers/ata/pata_palmld.c
+++ b/drivers/ata/pata_palmld.c
@@ -63,8 +63,8 @@ static int palmld_pata_probe(struct platform_device *pdev)
 
 	/* remap drive's physical memory address */
 	mem = devm_platform_ioremap_resource(pdev, 0);
-	if (!mem)
-		return -ENOMEM;
+	if (IS_ERR(mem))
+		return PTR_ERR(mem);
 
 	/* request and activate power and reset GPIOs */
 	lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
-- 
2.25.1