drm/i915: Permit pinning whilst the device is 'suspended'

commit e3d8affb0d2d95f2da61e30ce86b33177feb91e8 upstream.

As pinning (allocating and binding GTT memory) does not actually invoke
GPU commands, it is safe, and indeed is attempted, during resumption
from suspension:

  [drm:intel_init_clock_gating] *ERROR* failed to pin power context: -16

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2e10b9a0db69a521770df06cd2faaa3ec8abf216..3d75c67fa78ca06720349bea9a348f15fe29bdc4 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2571,9 +2571,6 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
        bool retry_alloc = false;
        int ret;
 
-       if (dev_priv->mm.suspended)
-               return -EBUSY;
-
        if (obj_priv->madv != I915_MADV_WILLNEED) {
                DRM_ERROR("Attempting to bind a purgeable object\n");
                return -EINVAL;