[Intel-gfx] [PATCH 1/2 v2] drm/i915: Allow parsing of variable size child device entries from VBT

[Daniel Vetter]

On Wed, Aug 05, 2015 at 06:32:01PM +0300, David Weinehall wrote:
> On Wed, Aug 05, 2015 at 10:59:00AM +0200, Daniel Vetter wrote:
> > On Tue, Aug 04, 2015 at 04:55:52PM +0300, David Weinehall wrote:
> > > VBT version 196 increased the size of common_child_dev_config. The parser
> > > code assumed that the size of this structure would not change.
> > > 
> > > The modified code now copies the amount needed based on the VBT version,
> > > and emits a debug message if the VBT version is unknown (too new);
> > > since the struct config block won't shrink in newer versions it should
> > > be harmless to copy the maximum known size in such cases, so that's
> > > what we do, but emitting the warning is probably sensible anyway.
> > > 
> > > In the longer run it might make sense to modify the parser code to
> > > use a version/feature mapping, rather than hardcoding things like this,
> > > but for now the variants are fairly managable.
> > > 
> > > v2: Stricter size checks
> > > 
> > > Signed-off-by: David Weinehall <david.weinehall at linux.intel.com>
> > 
> > Since Chris mentioned that this should fix a regression I applied it to
> > drm-intel-fixes.
> 
> Great! Will you merge the other patch in the series to the nightly
> build?

I only merged this fast-tracked because it fixes a regression. For the
other patch normal review rules still apply (i.e. I won't do it).
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch