[PATCH -next] ata: palmld: fix return value check in palmld_pata_probe()

[Yang Yingliang]

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@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 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