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

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Message-ID: <SN4PR0201MB3472051AEFD34AB114827ABBCBEA0@SN4PR0201MB3472.namprd02.prod.outlook.com>
Date:   Mon, 9 Nov 2020 17:10:24 +0000
From:   Dragan Cvetic <draganc@...inx.com>
To:     Harshal Chaudhari <harshalchau04@...il.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     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()

> -----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

Acked-by: Dragan Cvetic <dragan.cvetic@...inx.com>