drm/i915/gem: Retire directly for mmap-offset shrinking

Now that we can retire without taking struct_mutex, we can do so to
handle shrinking the mmap-offset space after an allocation failure.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004134015.13204-11-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index 418d0d2..45bbd22 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -431,19 +431,12 @@ static int create_mmap_offset(struct drm_i915_gem_object *obj)
                return 0;
 
        /* Attempt to reap some mmap space from dead objects */
-       do {
-               err = i915_gem_wait_for_idle(i915, MAX_SCHEDULE_TIMEOUT);
-               if (err)
-                       break;
+       err = i915_retire_requests_timeout(i915, MAX_SCHEDULE_TIMEOUT);
+       if (err)
+               return err;
 
-               i915_gem_drain_freed_objects(i915);
-               err = drm_gem_create_mmap_offset(&obj->base);
-               if (!err)
-                       break;
-
-       } while (flush_delayed_work(&i915->gem.retire_work));
-
-       return err;
+       i915_gem_drain_freed_objects(i915);
+       return drm_gem_create_mmap_offset(&obj->base);
 }
 
 int