linux-kernel - Re: [PATCH v2] staging: r8188eu: convert rtw_pwr

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Date:   Tue, 26 Jul 2022 23:14:27 +0100
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     gregkh@...uxfoundation.org, Larry.Finger@...inger.net,
        paskripkin@...il.com, straube.linux@...il.com, martin@...ser.cx,
        abdun.nihaal@...il.com, philipp.g.hortmann@...il.com,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] staging: r8188eu: convert rtw_pwr_wakeup to correct
 error code semantics

On Tue, Jul 26, 2022 at 06:46:02PM +0300, Dan Carpenter wrote:
> On Tue, Jul 26, 2022 at 04:35:59PM +0300, Dan Carpenter wrote:
> > On Mon, Jul 25, 2022 at 11:07:45PM +0100, Phillip Potter wrote:
> > > Convert the rtw_pwr_wakeup function to use 0 on success and an appropriate
> > > error code on error. For the first failure block where ips_leave is
> > > invoked, use -ENOMEM as this is the main cause of failure here anyway.
> > > For the second failure block, use -EBUSY, as it seems the most
> > > appropriate.
> > > 
> > > Finally, within the functions rtw_wx_set_mode, rtw_wx_set_wap,
> > > rtw_wx_set_scan and rtw_wx_set_essid, pass the error code on from
> > > rtw_pwr_wakeup as appropriate now that it is converted.
> > > 
> > > This gets the driver closer to removal of the non-standard _SUCCESS and
> > > _FAIL definitions, which are inverted compared to the standard in-kernel
> > > error code mechanism.
> > > 
> > > Signed-off-by: Phillip Potter <phil@...lpotter.co.uk>
> > > ---
> > > 
> > > Changes from V1: Act on feedback from Dan Carpenter:
> > > * Try to use more appropriate error codes than -EPERM.
> > > * Revert the places where existing -1 was converted as they are out of
> > >   scope.
> > > * Preserve error codes in places where calling function already uses
> > >   proper negative semantics, so that they can be passed through to the
> > >   caller.
> > > 
> > 
> > This is a much better patch, right?  Everything hangs together better.
> > 
> > There are seven callers which need to be updated and all of them are
> > updated.
> > 
> > Reviewed-by: Dan Carpenter
> 
> Oops.  I messed up my R-b tag.
> 
> Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
> 
> regards,
> dan carpenter

Agreed, much cleaner this way. Thanks very much for the Reviewed-by tag
:-)

I'll attempt to structure the others in a similar fashion, as far as is
possible anyway.

All the best,
Phil