[PATCH -next] clocksource/drivers/ingenic_ost: Fix return value check in ingenic_ost_probe()

['Wei Yongjun]

From: Wei Yongjun <weiyongj...@huawei.com>

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 <hul...@huawei.com>
Signed-off-by: Wei Yongjun <weiyongj...@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 029efc2731b4..6af2470136bd 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");