drm/i915/eb: Report EFAULT when writing updated exec_obj offset

This was thrown out in

commit 2889caa9232109afc8881f29a2205abeb5709d0c
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jun 16 15:05:19 2017 +0100

    drm/i915: Eliminate lots of iterations over the execobjects array

with the justification that we're already past the point of no return
(in a comment, not in the commit message).

That's true, but also if userspace is silly and hands us read-only
memory, then we'll only notice that when we write to it. So reporting
the error is still our duty, not that it's likely - at this point
we're dealing with nasty userspace anyway.

Also this is what we've been doing for around 8 years before this
patch changed it.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>

0 files changed, 0 insertions, 0 deletions