linux-kernel - Re: [PATCH] usb: trancevibrator: simplify tv

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Message-ID: <CAD-N9QUKWsRHWme+fQ8KtBXKFB=cU8spa0eu3u4iVXuOE3x5cw@mail.gmail.com>
Date:   Wed, 20 Jul 2022 15:56:16 +0800
From:   Dongliang Mu <mudongliangabcd@...il.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     慕冬亮 <dzm91@...t.edu.cn>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        USB <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] usb: trancevibrator: simplify tv_probe

On Wed, Jul 20, 2022 at 3:46 PM Christophe JAILLET
<christophe.jaillet@...adoo.fr> wrote:
>
> Le 20/07/2022 à 09:23, Dongliang Mu a écrit :
> > From: Dongliang Mu <mudongliangabcd-Re5JQEeQqe8AvxtiuMwx3w@...lic.gmane.org>
> >
> > The function tv_probe does not need to invoke kfree when the
> > allocation fails. So let's simplify the code of tv_probe.
> > Another change is to remove a redundant space.
> >
> > Signed-off-by: Dongliang Mu <mudongliangabcd-Re5JQEeQqe8AvxtiuMwx3w@...lic.gmane.org>
> > ---
> >   drivers/usb/misc/trancevibrator.c | 13 +++----------
> >   1 file changed, 3 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/usb/misc/trancevibrator.c b/drivers/usb/misc/trancevibrator.c
> > index 26baba3ab7d7..30d4d774d448 100644
> > --- a/drivers/usb/misc/trancevibrator.c
> > +++ b/drivers/usb/misc/trancevibrator.c
> > @@ -84,29 +84,22 @@ static int tv_probe(struct usb_interface *interface,
> >   {
> >       struct usb_device *udev = interface_to_usbdev(interface);
> >       struct trancevibrator *dev;
> > -     int retval;
> >
> >       dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
> > -     if (!dev) {
> > -             retval = -ENOMEM;
> > -             goto error;
> > -     }
> > +     if (!dev)
> > +             return -ENOMEM;
> >
> >       dev->udev = usb_get_dev(udev);
> >       usb_set_intfdata(interface, dev);
> >
> >       return 0;
>
> Hi,
>
> looks like:
>
> error:
>         kfree(dev);
>         return retval;
>
> at the end of the function can be removed as-well.
>

My patch actually removes them.

> Just my 2c.
>
> CJ