The debugfs_create_dir() function returns error pointers.
It never returns NULL. Most incorrect error checks were fixed,
but the one in err_inject_init() was forgotten.

Fix the remaining error check.

Signed-off-by: Wang Ming <machel@vivo.com>
---
 lib/notifier-error-inject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/notifier-error-inject.c b/lib/notifier-error-inject.c
index 2b24ea6c9497..c49354c23802 100644
--- a/lib/notifier-error-inject.c
+++ b/lib/notifier-error-inject.c
@@ -83,7 +83,7 @@ static int __init err_inject_init(void)
 	notifier_err_inject_dir =
 		debugfs_create_dir("notifier-error-inject", NULL);
 
-	if (!notifier_err_inject_dir)
+	if (IS_ERR(notifier_err_inject_dir))
 		return -ENOMEM;
 
 	return 0;
-- 
2.25.1

On Wed, Jul 12, 2023 at 09:52:11PM +0800, Wang Ming wrote:
> The debugfs_create_dir() function returns error pointers.
> It never returns NULL. Most incorrect error checks were fixed,
> but the one in err_inject_init() was forgotten.
> 
> Fix the remaining error check.
> 
> Signed-off-by: Wang Ming <machel@vivo.com>
> ---
>  lib/notifier-error-inject.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/notifier-error-inject.c b/lib/notifier-error-inject.c
> index 2b24ea6c9497..c49354c23802 100644
> --- a/lib/notifier-error-inject.c
> +++ b/lib/notifier-error-inject.c
> @@ -83,7 +83,7 @@ static int __init err_inject_init(void)
>  	notifier_err_inject_dir =
>  		debugfs_create_dir("notifier-error-inject", NULL);
>  
> -	if (!notifier_err_inject_dir)
> +	if (IS_ERR(notifier_err_inject_dir))
>  		return -ENOMEM;

Please do not do any different codepath if a debugfs_*() call fails or
succeeds.

Why do you need to check this at all?

And why are you creating this directory at the root of debugfs?

thanks,

greg k-h