linux-kernel - Re: [PATCH] cxl/mem: return -EFAULT if copy_to

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Message-ID: <CAPcyv4jCAcZH3C-kSbYVjBu34g60aYzQpwANjXecY-ziUKxguQ@mail.gmail.com>
Date:   Fri, 19 Feb 2021 07:39:23 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Alison Schofield <alison.schofield@...el.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>, linux-cxl@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] cxl/mem: return -EFAULT if copy_to_user() fails

On Fri, Feb 19, 2021 at 1:55 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> The copy_to_user() function returns the number of bytes remaining to be
> copied, but we want to return -EFAULT if the copy doesn't complete.
>
> Fixes: b754ffbbc0ee ("cxl/mem: Add basic IOCTL interface")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---

Looks good, Dan, thanks!