[Intel-gfx] drm-next xf86-video-vmware breakage Was [PATCH 02/10] drm/uapi: Validate the mode flags/type

[Thomas Hellstrom]

Hi, Ville,

On 11/14/2017 07:32 PM, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Currently userspace is allowed to feed in any king of garbage in the
> high bits of the mode flags/type, as are drivers when probing modes.
> Reject any mode with bogus flags/type.
>
> Hopefully this won't break any current userspace...

Unfortunately this breaks xf86-video-vmware which currently leaves the 
mode->type uninitialized :(.
That code is inherited from the old gallium xorg state tracker. I don't 
know whether it has spread elsewhere but the symptoms are that the X 
server frequently dies failing to set screen resources, a very 
uninformative error.

I'll fix the xf86-video-vmware driver, but I guess we need to back out 
the mode->type check.

/Thomas