tree 1645cf5a2150b6e081b2fe4d79e7f7a282d9aff2
parent 1690e1eb7a9021826853e181baa48dd77090da28
author Daniel Vetter <daniel.vetter@ffwll.ch> 1323867429 +0100
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1327857850 +0100

drm/i915: don't trash the gtt when running out of fences

With the fence accounting fixed up in the previous commit not finding
enough fences is a fatal error and userspace bug. Trashing the entire
gtt is not gonna turn up that missing fence, so don't to this by
returning another error thatn ENOSPC.

This has the added benefit that it's easier to distinguish fence
accounting errors from gtt space accounting issues.

TTM serves as precendence for the EDEADLK error code - it returns it
when the reservation code needs resources already blocked by the
current reservation.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>