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Date:   Thu, 10 Jan 2019 17:00:24 +0000
From:   Sidong Yang <realwakka@gmail.com>
To:     Dan Carpenter <dan.carpenter@oracle.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] staging: vboxvideo: vbox_main: Remove unnecessary local
 variable
Message-ID: <20190110170023.4vcyws3ktsf2sz3g@raspberrypi>
References: <20190110061347.31326-1-realwakka@gmail.com>
 <20190110122358.GC1743@kadam>
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On Thu, Jan 10, 2019 at 03:23:58PM +0300, Dan Carpenter wrote:
> On Thu, Jan 10, 2019 at 06:13:47AM +0000, Sidong Yang wrote:
> > Removed unnecessary local variable in have_hgsmi_mode_hints.
> > The result of hgsmi_query_conf should be directly compared without
> > assigning to local variable.
> > 
> > Signed-off-by: Sidong Yang <realwakka@gmail.com>
> > ---
> 
> I sort of prefer the original...
> 
> The hgsmi_query_conf() function returns negative error codes if it
> can't complete the query because of allocation failures.  To me that's
> more obvious, when we write it in the original way.
> 
> In the new code it looks like it returns bool or something.  The
> copy_to/from_user() are normally written like if (copy_to_user()) {
> but those don't return negative error codes so it's a different
> situation.
> 

Hi, Dan.

I think you just point out that my code isn't obvious because the
function returns negative error codes. I agree with you. But what if
change my code like if(hgsmi_query_conf() != 0). 

> This isn't something in checkpatch or CodingStyle so there isn't a
> standard.  It's just personal opinion vs personal opinion.  If you were
> going to do a lot of vboxvideo development, then it would be your
> opinion which matters the most because you are doing the work.  But
> this is your first vboxvideo patch...
> 
> Let's just leave it as-is.

I agree with this comment. I'm just a newbie for this module and It
isn't about checkpatch or CodingStyle. but I just wondered if my code
has problem.

regards,
Sidong Yang

> 
> regards,
> dan carpenter
> 
>