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

[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@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


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

[Ahmad Fatoum]

On 04.01.23 10:27, Yang Yingliang wrote:
> 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@huawei.com>

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

> ---
> 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);
>  

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

[Alexander Stein]

Hi,

thanks for the update.

Am Mittwoch, 4. Januar 2023, 10:27:02 CET schrieb 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@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);

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>




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