linux-kernel - Re: [PATCH 03/10] comedi: get rid of compat_alloc_user_space() mess in COMEDI

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Message-ID: <beb8c74e-e6ea-1b81-8dc0-16a1cab9603d@mev.co.uk>
Date:   Fri, 29 May 2020 11:35:23 +0100
From:   Ian Abbott <abbotti@....co.uk>
To:     Al Viro <viro@...IV.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 03/10] comedi: get rid of compat_alloc_user_space() mess
 in COMEDI_CHANINFO compat

On 29/05/2020 01:35, Al Viro wrote:
> From: Al Viro <viro@...iv.linux.org.uk>
> 
> Just take copy_from_user() out of do_chaninfo_ioctl() into the caller and
> have compat_chaninfo() build a native version and pass it to do_chaninfo_ioctl()
> directly.
> 
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
>   drivers/staging/comedi/comedi_fops.c | 68 ++++++++++++++++--------------------
>   1 file changed, 30 insertions(+), 38 deletions(-)

Signed-off-by: Ian Abbott <abbotti@....co.uk>

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