Re: [PATCH 55/61] interconnect: Prefer IS_ERR_OR_NULL over manual NULL check

[Krzysztof Kozlowski <krzk@kernel.org>]

On 10/03/2026 12:49, Philipp Hahn wrote:
> Prefer using IS_ERR_OR_NULL() over using IS_ERR() and a manual NULL
> check.
> 
> Semantich change: Previously the code only printed the warning on error,
> but not when the pointer was NULL. Now the warning is printed in both
> cases!

NAK, read the code

> 
> Change found with coccinelle.
> 
> To: Georgi Djakov <djakov@kernel.org>
> Cc: linux-pm@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Philipp Hahn <phahn-oss@avm.de>
> ---
>  drivers/interconnect/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
> index 8569b78a18517b33abeafac091978b25cbc1acc7..22e92b30f73853d5bd2e05b4f52cb5aa22556468 100644
> --- a/drivers/interconnect/core.c
> +++ b/drivers/interconnect/core.c
> @@ -790,7 +790,7 @@ void icc_put(struct icc_path *path)
>  	size_t i;
>  	int ret;
>  
> -	if (!path || WARN_ON(IS_ERR(path)))
> +	if (WARN_ON(IS_ERR_OR_NULL(path)))

IS_ERR_OR_NULL is simply discouraged, but beside of code preference, you
just added bug here. This is clearly not equivalent and you emit warn on
perfectly valid case!

Best regards,
Krzysztof