linux-kernel - Re: [PATCH] drm/radeon: Fix Asus M2A-VM HDMI EDID error flooding problem

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Message-ID: <20110627141404.5031c528@endymion.delvare>
Date:	Mon, 27 Jun 2011 14:14:04 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Alex Deucher <alexdeucher@...il.com>
Cc:	Thomas Reim <thomas.reim@...omuc.de>, reimth@...glemail.com,
	Dave Airlie <airlied@...hat.com>,
	Mario Kleiner <mario.kleiner@...bingen.mpg.de>,
	Tyson Whitehead <twhitehead@...il.com>,
	Jason Wessel <jason.wessel@...driver.com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Thomas Reim <rdratlos@...oo.co.uk>
Subject: Re: [PATCH] drm/radeon: Fix Asus M2A-VM HDMI EDID error flooding
 problem

On Fri, 24 Jun 2011 09:36:56 -0400, Alex Deucher wrote:
> On Fri, Jun 24, 2011 at 12:02 AM, Thomas Reim <thomas.reim@...omuc.de> wrote:
> >> > diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
> >> > index 781196d..7e93cf9 100644
> >> > --- a/drivers/gpu/drm/radeon/radeon_i2c.c
> >> > +++ b/drivers/gpu/drm/radeon/radeon_i2c.c
> >> > @@ -34,7 +34,7 @@
> >> >  */
> >> >  bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
> >> >  {
> >> > -       u8 out_buf[] = { 0x0, 0x0};
> >> > +       u8 out = 0x0;
> >> >        u8 buf[2];
> >> >        int ret;
> >> >        struct i2c_msg msgs[] = {
> >> > @@ -42,7 +42,7 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
> >> >                        .addr = 0x50,
> >> >                        .flags = 0,
> >> >                        .len = 1,
> >> > -                       .buf = out_buf,
> >> > +                       .buf = &out,
> >> >                },
> >> >                {
> >> >                        .addr = 0x50,
> >>
> >>
> >> The change above doesn't seem to be related.
> >
> > This was a comment from Jean who complained about the ineffective usage
> > of the i2c bus. But I can also restore the old code. What's your
> > preference?
> 
> Ah, I missed that.  Let's make that a separate patch, or fix it when
> you add support for the extended edid check.
> 
> Thanks for fixing this up.

I'll send a patch for that one, as I found it. It is indeed unrelated
to the problem, I mentioned it only to avoid the same mistake in a
newly added function.

It's a very minor cleanup / optimization, BTW.

-- 
Jean Delvare
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