linux-kernel - Re: [PATCH] staging: greybus: loopback: fix up checkpath macro do while error.

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Date:   Mon, 3 Apr 2023 09:21:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Dan Carpenter <error27@...il.com>
Cc:     Ángel Alberto Carretero 
        <angelalbertoc.r@...il.com>,
        Bryan O'Donoghue <pure.logic@...us-software.ie>,
        Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
        greybus-dev@...ts.linaro.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: greybus: loopback: fix up checkpath macro do
 while error.

On Mon, Apr 03, 2023 at 09:23:55AM +0300, Dan Carpenter wrote:
> On Sun, Apr 02, 2023 at 08:22:35PM +0200, Ángel Alberto Carretero wrote:
> > 
> > 
> > On 02/04/2023 15:16, Greg Kroah-Hartman wrote:
> > > On Sun, Apr 02, 2023 at 02:25:51PM +0200, Angel Alberto Carretero wrote:
> > > > Wrap macro in a do-while statement.
> > > > 
> > > > Signed-off-by: Angel Alberto Carretero <angelalbertoc.r@...il.com>
> > > > ---
> > > >   drivers/staging/greybus/loopback.c | 8 +++++---
> > > >   1 file changed, 5 insertions(+), 3 deletions(-)
> > > > 
> > > > diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c
> > > > index d7b39f3bb652..371809770ed0 100644
> > > > --- a/drivers/staging/greybus/loopback.c
> > > > +++ b/drivers/staging/greybus/loopback.c
> > > > @@ -162,9 +162,11 @@ static ssize_t name##_avg_show(struct device *dev,		\
> > > >   static DEVICE_ATTR_RO(name##_avg)
> > > >   #define gb_loopback_stats_attrs(field)				\
> > > > -	gb_loopback_ro_stats_attr(field, min, u);		\
> > > > -	gb_loopback_ro_stats_attr(field, max, u);		\
> > > > -	gb_loopback_ro_avg_attr(field)
> > > > +	do {		\
> > > > +		gb_loopback_ro_stats_attr(field, min, u);		\
> > > > +		gb_loopback_ro_stats_attr(field, max, u);		\
> > > > +		gb_loopback_ro_avg_attr(field);		\
> > > > +	} while (0)
> > > >   #define gb_loopback_attr(field, type)					\
> > > >   static ssize_t field##_show(struct device *dev,				\
> > > > -- 
> > > > 2.40.0
> > > > 
> > > > 
> > > 
> > > Any specific reason why you did not test build your change before
> > > submitting it?
> > > 
> > > thanks,
> > > 
> > > greg k-h
> > 
> > Apologies, we can drop the patch. I was trying to find an error as part
> > of the eudyptula challenge and thought I was compiling the driver
> > correctly. Upon further examination, the macro cannot be written with a
> > do-while because it is defining functions.
> 
> The "eudyptula challenge" and other first patch guides should be updated
> to tell people to search for their code on lore.kernel.org before
> sending a patch.

The "eudyptula challenge" is not currently running and has not been for
many years now so I do not know where the original poster got their
information from.

thanks,

greg k-h