[tip: timers/core] clocksource/drivers/ingenic_ost: Fix return value check in ingenic_ost_probe()

["tip-bot2 for Wei Yongjun" <tip-bot2@linutronix.de>]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     2a65f7e2772613debd03fa2492e76a635aa04545
Gitweb:        https://git.kernel.org/tip/2a65f7e2772613debd03fa2492e76a635aa04545
Author:        Wei Yongjun <weiyongjun1@huawei.com>
AuthorDate:    Mon, 08 Mar 2021 12:30:31 
Committer:     Daniel Lezcano <daniel.lezcano@linaro.org>
CommitterDate: Thu, 08 Apr 2021 13:24:15 +02:00

clocksource/drivers/ingenic_ost: Fix return value check in ingenic_ost_probe()

In case of error, the function device_node_to_regmap() returns
ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().

Fixes: ca7b72b5a5f2 ("clocksource: Add driver for the Ingenic JZ47xx OST")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210308123031.2285083-1-weiyongjun1@huawei.com
---
 drivers/clocksource/ingenic-ost.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/ingenic-ost.c b/drivers/clocksource/ingenic-ost.c
index d2d6646..06d2575 100644
--- a/drivers/clocksource/ingenic-ost.c
+++ b/drivers/clocksource/ingenic-ost.c
@@ -88,9 +88,9 @@ static int __init ingenic_ost_probe(struct platform_device *pdev)
 		return PTR_ERR(ost->regs);
 
 	map = device_node_to_regmap(dev->parent->of_node);
-	if (!map) {
+	if (IS_ERR(map)) {
 		dev_err(dev, "regmap not found");
-		return -EINVAL;
+		return PTR_ERR(map);
 	}
 
 	ost->clk = devm_clk_get(dev, "ost");