[PATCH v2] soc: imx8m: fix wrong return value check of of_clk_get_by_name()

[Yang Yingliang]

of_clk_get_by_name() never returns NULL pointer, it will return
ERR_PTR() when it fails, so replace the check with IS_ERR().

Fixes: 836fb30949d9 ("soc: imx8m: Enable OCOTP clock before reading the register")
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
v1 -> v2:
  Check WARN_ON() instead of checking IS_ERR().
---
 drivers/soc/imx/soc-imx8m.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c
index 28144c699b0c..d1dbe318be53 100644
--- a/drivers/soc/imx/soc-imx8m.c
+++ b/drivers/soc/imx/soc-imx8m.c
@@ -66,10 +66,8 @@ static u32 __init imx8mq_soc_revision(void)
 	ocotp_base = of_iomap(np, 0);
 	WARN_ON(!ocotp_base);
 	clk = of_clk_get_by_name(np, NULL);
-	if (!clk) {
-		WARN_ON(!clk);
+	if (WARN_ON(IS_ERR(clk)))
 		return 0;
-	}
 
 	clk_prepare_enable(clk);
 
-- 
2.25.1