[PATCH] drm: stop vmgfx driver explosion

[Jakob Bornecrantz]

----- Original Message -----
> From: Alan Cox <alan at linux.intel.com>
> 
> If you do a page flip with no flags set then event is NULL. If event
> is NULL then the vmw_gfx driver likes to go digging into NULL and
> extracts NULL->base.file_priv.
> 
> On a modern kernel with NULL mapping protection it's just another
> oops, without it there are some "intriguing" possibilities.
> 
> What it should do is an open question but that for the driver owners
> to sort out.
> 
> Signed-off-by: Alan Cox <alan at linux.intel.com>

Thanks Alan!

Reviewed-by: Jakob Bornecrantz <jakob at vmware.com>

I think CC stable is in order.

Cheers, Jakob.