[PATCH v2] soc: imx8m: Fix return value check in imx8mq_soc_revision()

From: Zheng Yongjun
Date: Mon Nov 28 2022 - 03:40:19 EST


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

Fixes: 836fb30949d9 ("soc: imx8m: Enable OCOTP clock before reading the register")
Signed-off-by: Zheng Yongjun <zhengyongjun3@xxxxxxxxxx>
---
Changes in v2:
- Rewrite code and make it more concise.
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);

--
2.17.1