From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jani Nikula <jani.nikula@intel.com>
Cc: kbuild@01.org, kbuild-all@01.org, linux-kernel@vger.kernel.org,
"Chris Wilson" <chris@chris-wilson.co.uk>,
intel-gfx@lists.freedesktop.org,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>
Subject: Re: drivers/gpu/drm/i915/display/intel_display.c:3934 skl_plane_stride() error: testing array offset 'color_plane' after use.
Date: Mon, 16 Sep 2019 10:59:13 +0300 [thread overview]
Message-ID: <20190916075913.GZ20699@kadam> (raw)
In-Reply-To: <87lfuou27c.fsf@intel.com>
On Mon, Sep 16, 2019 at 10:31:35AM +0300, Jani Nikula wrote:
> On Sat, 14 Sep 2019, Dan Carpenter <dan.carpenter@oracle.com> wrote:
> > tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head: a7f89616b7376495424f682b6086e0c391a89a1d
> > commit: df0566a641f959108c152be748a0a58794280e0e drm/i915: move modesetting core code under display/
> > date: 3 months ago
> >
> > If you fix the issue, kindly add following tag
> > Reported-by: kbuild test robot <lkp@intel.com>
> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> >
> > New smatch warnings:
> > drivers/gpu/drm/i915/display/intel_display.c:3934 skl_plane_stride() error: testing array offset 'color_plane' after use.
> > drivers/gpu/drm/i915/display/intel_display.c:16328 intel_sanitize_encoder() error: we previously assumed 'crtc' could be null (see line 16318)
>
> Odd, what changed to provoke the warnings now? Or is the smatch test
> new?
>
It looks like the cross function DB is out of data slightly. Maybe
because the file moved? On my system Smatch knows that color_plane is
0-1 and plane_state->color_plane[] is a two element array so it doesn't
print the warning.
This is just a sanity check which is never triggered. Should the sanity
check be move? What was originally intended? It's hard to say.
regards,
dan carpenter
next prev parent reply other threads:[~2019-09-16 7:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-14 4:08 drivers/gpu/drm/i915/display/intel_display.c:3934 skl_plane_stride() error: testing array offset 'color_plane' after use Dan Carpenter
2019-09-16 7:31 ` Jani Nikula
2019-09-16 7:59 ` Dan Carpenter [this message]
2019-09-16 12:43 ` Ville Syrjälä
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