[Intel-gfx] [PATCH 2/7] drm/i915: Do not call API requiring struct_mutex where it is not available

[Chris Wilson]

On Mon, Jan 11, 2016 at 02:08:36PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> LRC code was calling GEM API like i915_gem_obj_ggtt_offset from
> places where the struct_mutex cannot be grabbed (irq handlers).

A more general point is that we have to move it out of the interrupt
handler because the current code allows for userspace to trivially panic
the machine...
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre