[PATCH] ucd9000.c: Drop error checking for debugfs_create_dir

[PATCH] ucd9000.c: Drop error checking for debugfs_create_dir

[Osama Muhammad]

This patch fixes the error checking in ucd9000.c.
The DebugFS kernel API is developed in
a way that the caller can safely ignore the errors that
occur during the creation of DebugFS nodes.

Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
---
 drivers/hwmon/pmbus/ucd9000.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c
index 3daaf2237832..73559afa8ba7 100644
--- a/drivers/hwmon/pmbus/ucd9000.c
+++ b/drivers/hwmon/pmbus/ucd9000.c
@@ -512,8 +512,6 @@ static int ucd9000_init_debugfs(struct i2c_client *client,
 		return -ENOENT;
 
 	data->debugfs = debugfs_create_dir(client->name, debugfs);
-	if (!data->debugfs)
-		return -ENOENT;
 
 	/*
 	 * Of the chips this driver supports, only the UCD9090, UCD90160,
-- 
2.34.1

Re: [PATCH] ucd9000.c: Drop error checking for debugfs_create_dir

[Guenter Roeck]

On Thu, May 25, 2023 at 09:13:13PM +0500, Osama Muhammad wrote:
> This patch fixes the error checking in ucd9000.c.

Sure, but you should also explain what is wrong with the code
(i.e., that debugfs_create_dir() does not return NULL but an ERR_PTR
after an error).

> The DebugFS kernel API is developed in
> a way that the caller can safely ignore the errors that
> occur during the creation of DebugFS nodes.
> 

If you plan t send more patches, please watch out for the subject line
to match subject lines used in a subsystem. Here it should start with
something like

hwmon: (pmbus/ucd9000) ...

Thanks,
Guenter

> Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
> ---
>  drivers/hwmon/pmbus/ucd9000.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c
> index 3daaf2237832..73559afa8ba7 100644
> --- a/drivers/hwmon/pmbus/ucd9000.c
> +++ b/drivers/hwmon/pmbus/ucd9000.c
> @@ -512,8 +512,6 @@ static int ucd9000_init_debugfs(struct i2c_client *client,
>  		return -ENOENT;
>  
>  	data->debugfs = debugfs_create_dir(client->name, debugfs);
> -	if (!data->debugfs)
> -		return -ENOENT;
>  
>  	/*
>  	 * Of the chips this driver supports, only the UCD9090, UCD90160,
> -- 
> 2.34.1
> 

Re: [PATCH] ucd9000.c: Drop error checking for debugfs_create_dir

[Guenter Roeck]

On Thu, May 25, 2023 at 11:36:51PM +0500, Osama Muhammad wrote:
> On Thu, 25 May 2023 at 23:21, Guenter Roeck <linux@roeck-us.net> wrote:
> 
> > On Thu, May 25, 2023 at 09:13:13PM +0500, Osama Muhammad wrote:
> > > This patch fixes the error checking in ucd9000.c.
> >
> > Sure, but you should also explain what is wrong with the code
> > (i.e., that debugfs_create_dir() does not return NULL but an ERR_PTR
> > after an error).
> >
> Should I send another version of the patch?
> 
Please do.

Guenter
> 
> >
> > > The DebugFS kernel API is developed in
> > > a way that the caller can safely ignore the errors that
> > > occur during the creation of DebugFS nodes.
> > >
> >
> > If you plan t send more patches, please watch out for the subject line
> > to match subject lines used in a subsystem. Here it should start with
> > something like
> >
> > hwmon: (pmbus/ucd9000) ...
> >
> > Thanks for the information and will keep it in mind while sending patches
> afterwards.
> 
> > Thanks,
> > Guenter
> >
> > > Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
> > > ---
> > >  drivers/hwmon/pmbus/ucd9000.c | 2 --
> > >  1 file changed, 2 deletions(-)
> > >
> > > diff --git a/drivers/hwmon/pmbus/ucd9000.c
> > b/drivers/hwmon/pmbus/ucd9000.c
> > > index 3daaf2237832..73559afa8ba7 100644
> > > --- a/drivers/hwmon/pmbus/ucd9000.c
> > > +++ b/drivers/hwmon/pmbus/ucd9000.c
> > > @@ -512,8 +512,6 @@ static int ucd9000_init_debugfs(struct i2c_client
> > *client,
> > >               return -ENOENT;
> > >
> > >       data->debugfs = debugfs_create_dir(client->name, debugfs);
> > > -     if (!data->debugfs)
> > > -             return -ENOENT;
> > >
> > >       /*
> > >        * Of the chips this driver supports, only the UCD9090, UCD90160,
> > > --
> > > 2.34.1
> > >
> 
> 
> Thanks,
> Osmten