LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Souptick Joarder <jrdr.linux@gmail.com>
To: Robin van der Gracht <robin@protonic.nl>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
	linux-kernel@vger.kernel.org,
	Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH 2/2] auxdisplay/ht16k33.c: Convert to use vm_map_pages_zero()
Date: Thu, 23 May 2019 13:48:26 +0530	[thread overview]
Message-ID: <CAFqt6zZA32QA-6VtaKcrEtq=qkoGLHpirSvXb5wt7-wd_-74hQ@mail.gmail.com> (raw)
In-Reply-To: <20190521085547.58e1650c@erd987>

On Tue, May 21, 2019 at 12:24 PM Robin van der Gracht <robin@protonic.nl> wrote:
>
> On Mon, 20 May 2019 21:00:58 +0530
> Souptick Joarder <jrdr.linux@gmail.com> wrote:
>
> > While using mmap, the incorrect value of length and vm_pgoff are
> > ignored and this driver go ahead with mapping fbdev.buffer
> > to user vma.
> >
> > Convert vm_insert_pages() to use vm_map_pages_zero(). We could later
> > "fix" these drivers to behave according to the normal vm_pgoff
> > offsetting simply by removing the _zero suffix on the function name
> > and if that causes regressions, it gives us an easy way to revert.
> >
> > Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
> > ---
> >  drivers/auxdisplay/ht16k33.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
> > index 21393ec..9c0bb77 100644
> > --- a/drivers/auxdisplay/ht16k33.c
> > +++ b/drivers/auxdisplay/ht16k33.c
> > @@ -223,9 +223,9 @@ static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)
> >  static int ht16k33_mmap(struct fb_info *info, struct vm_area_struct *vma)
> >  {
> >       struct ht16k33_priv *priv = info->par;
> > +     struct page *pages = virt_to_page(priv->fbdev.buffer);
> >
> > -     return vm_insert_page(vma, vma->vm_start,
> > -                           virt_to_page(priv->fbdev.buffer));
> > +     return vm_map_pages_zero(vma, &pages, 1);
> >  }
> >
> >  static struct fb_ops ht16k33_fb_ops = {
>
> Acked-by: Robin van der Gracht <robin@protonic.nl>

Miguel, Ack from Robin is missing in linux-next-20190523 when applied.

  reply	other threads:[~2019-05-23  8:18 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-20 15:30 Souptick Joarder
2019-05-21  6:55 ` Robin van der Gracht
2019-05-23  8:18   ` Souptick Joarder [this message]
2019-05-23 12:58     ` Miguel Ojeda
2019-05-24  4:22       ` Miguel Ojeda
2019-05-24  6:07         ` Souptick Joarder
2019-05-28 19:03           ` Miguel Ojeda
2019-05-23 13:23 ` Miguel Ojeda
2019-05-24  6:10   ` Souptick Joarder
2019-05-26 16:11 Souptick Joarder

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAFqt6zZA32QA-6VtaKcrEtq=qkoGLHpirSvXb5wt7-wd_-74hQ@mail.gmail.com' \
    --to=jrdr.linux@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=miguel.ojeda.sandonis@gmail.com \
    --cc=robin@protonic.nl \
    --cc=willy@infradead.org \
    --subject='Re: [PATCH 2/2] auxdisplay/ht16k33.c: Convert to use vm_map_pages_zero()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).