linux-kernel - Re: [PATCH] misc: xilinx_sdfec: add compat_ptr

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Date:   Sun, 1 Nov 2020 22:55:25 +0530
From:   harshal chaudhari <harshalchau04@...il.com>
To:     Dragan Cvetic <draganc@...inx.com>
Cc:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Derek Kiernan <dkiernan@...inx.com>,
        "arnd@...db.de" <arnd@...db.de>, Michal Simek <michals@...inx.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] misc: xilinx_sdfec: add compat_ptr_ioctl()

On Fri, Oct 30, 2020 at 3:47 PM Dragan Cvetic <draganc@...inx.com> wrote:
>
> Hi Harshal,
>
> The code change is fine, no comment,
> but testing will be done at the beginning of the next week.
> Sorry for the late reply,

Thanks for your attention Dragan. i have send the another patch for
 to remove argument and command checks, so i request you to please
look into this patch and kindly confirm if anything needs to change
or any possibility.
Thanks once again.

> Regards
> Dragan
>
>
> > -----Original Message-----
> > From: Harshal Chaudhari <harshalchau04@...il.com>
> > Sent: Monday 26 October 2020 15:58
> > To: gregkh@...uxfoundation.org
> > Cc: Derek Kiernan <dkiernan@...inx.com>; Dragan Cvetic <draganc@...inx.com>; arnd@...db.de; Michal Simek
> > <michals@...inx.com>; linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
> > Subject: [PATCH] misc: xilinx_sdfec: add compat_ptr_ioctl()
> >
> > Driver has a trivial helper function to convert
> > the pointer argument and then call the native ioctl handler.
> > But now we have a generic implementation for that, so we can use it.
> >
> > Signed-off-by: Harshal Chaudhari <harshalchau04@...il.com>
> > ---
> >  drivers/misc/xilinx_sdfec.c | 12 +-----------
> >  1 file changed, 1 insertion(+), 11 deletions(-)
> >
> > diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
> > index 92291292756a..6f252793dceb 100644
> > --- a/drivers/misc/xilinx_sdfec.c
> > +++ b/drivers/misc/xilinx_sdfec.c
> > @@ -1016,14 +1016,6 @@ static long xsdfec_dev_ioctl(struct file *fptr, unsigned int cmd,
> >       return rval;
> >  }
> >
> > -#ifdef CONFIG_COMPAT
> > -static long xsdfec_dev_compat_ioctl(struct file *file, unsigned int cmd,
> > -                                 unsigned long data)
> > -{
> > -     return xsdfec_dev_ioctl(file, cmd, (unsigned long)compat_ptr(data));
> > -}
> > -#endif
> > -
> >  static __poll_t xsdfec_poll(struct file *file, poll_table *wait)
> >  {
> >       __poll_t mask = 0;
> > @@ -1054,9 +1046,7 @@ static const struct file_operations xsdfec_fops = {
> >       .release = xsdfec_dev_release,
> >       .unlocked_ioctl = xsdfec_dev_ioctl,
> >       .poll = xsdfec_poll,
> > -#ifdef CONFIG_COMPAT
> > -     .compat_ioctl = xsdfec_dev_compat_ioctl,
> > -#endif
> > +     .compat_ioctl = compat_ptr_ioctl,
> >  };
> >
> >  static int xsdfec_parse_of(struct xsdfec_dev *xsdfec)
> > --
> > 2.17.1
>