linux-kernel - Re: [PATCH 001/001] drivers/staging/vt6656/main

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Message-ID: <20170401031851.GA9149@Cassini.Home>
Date:   Fri, 31 Mar 2017 20:18:51 -0700
From:   Chewie Lin <linsh@...gonstate.edu>
To:     Joe Perches <joe@...ches.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>, greg@...ah.com,
        forest@...ttletooquiet.net, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 001/001] drivers/staging/vt6656/main_usb.c: checkpatch
 warning

On Fri, Mar 31, 2017 at 07:45:09PM -0700, Joe Perches wrote:
> On Fri, 2017-03-31 at 19:15 -0700, Randy Dunlap wrote:
> > On 03/31/17 18:59, Chewie Lin wrote:
> > > Replace string with formatted arguments in the dev_warn() call. It removes
> > > the checkpatch warning:
> > > 
> > > 	WARNING: Prefer using "%s", __func__ to embedded function names
> > > 	#417: FILE: main_usb.c:417:
> > > 	+			 "usb_device_reset fail status=%d\n", status);
> > > 
> > > 	total: 0 errors, 1 warnings, 1058 lines checked
> > > 
> > > And after fix:
> > > 
> > > 	main_usb.c has no obvious style problems and is ready for submission.
> > > 
> > > Signed-off-by: Chewie Lin <linsh@...gonstate.edu>
> > > ---
> > >  drivers/staging/vt6656/main_usb.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
> > > index 9e074e9..2d9e7af 100644
> > > --- a/drivers/staging/vt6656/main_usb.c
> > > +++ b/drivers/staging/vt6656/main_usb.c
> > > @@ -414,7 +414,7 @@ static void usb_device_reset(struct vnt_private *priv)
> > >  	status = usb_reset_device(priv->usb);
> > >  	if (status)
> > >  		dev_warn(&priv->usb->dev,
> > > -			 "usb_device_reset fail status=%d\n", status);
> > > +			 "%s=%d\n", "usb_device_reset fail status", status);
> > >  }
> > >  
> > >  static void vnt_free_int_bufs(struct vnt_private *priv)
> > > 
> > 
> > As other people have said:
> > 
> > This function is usb_device_reset().  If that function name string is to be
> > used in the message, it should be done so by using __func__.
> > See http://marc.info/?l=linux-driver-devel&m=149095639202492&w=2
> > 
> > Or is the called (failing) function name is to be kept in the message (as it
> > is currently), then the message should contain "usb_reset_device" instead of
> > "usb_device_reset".  See http://marc.info/?l=linux-driver-devel&m=149098680312723&w=2
> 
> If this is to be changed at all, I suggest
> just getting rid of the function.

These are good points, but any feedback on the dev_warn() call itself? 
I was trying to fix the checkpatch warning on my first try.