linux-kernel - [PATCH] watchdog: sa1100: Fix PTR_ERR_OR_ZERO() vs NULL check in sa1100dog

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Message-Id: <20240426075808.1582678-1-nichen@iscas.ac.cn>
Date: Fri, 26 Apr 2024 15:58:08 +0800
From: Chen Ni <nichen@...as.ac.cn>
To: wim@...ux-watchdog.org,
	linux@...ck-us.net,
	arnd@...db.de
Cc: linux-watchdog@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH] watchdog: sa1100: Fix PTR_ERR_OR_ZERO() vs NULL check in sa1100dog_probe()

devm_ioremap() doesn't return error pointers, it returns NULL on error.
Update the check accordingly.

Fixes: e86bd43bcfc5 ("watchdog: sa1100: use platform device registration")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
 drivers/watchdog/sa1100_wdt.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index 5d2df008b92a..34a917221e31 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c
@@ -191,9 +191,8 @@ static int sa1100dog_probe(struct platform_device *pdev)
 	if (!res)
 		return -ENXIO;
 	reg_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-	ret = PTR_ERR_OR_ZERO(reg_base);
-	if (ret)
-		return ret;
+	if (!reg_base)
+		return -ENOMEM;
 
 	clk = clk_get(NULL, "OSTIMER0");
 	if (IS_ERR(clk)) {
-- 
2.25.1