drm/i915/ttm: tweak priority hint selection

commit 0bdc0a0699929c814a8aecd55d2accb8c11beae2 upstream.

For some reason we are selecting PRIO_HAS_PAGES when we don't have
mm.pages, and vice versa.

v2(Thomas):
  - Add missing fixes tag

Fixes: 213d50927763 ("drm/i915/ttm: Introduce a TTM i915 gem object backend")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220209111652.468762-1-matthew.auld@intel.com
(cherry picked from commit ba2c5d15022a565da187d90e2fe44768e33e5034)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 6ea13159bffcc212912c8ed5c4601063471b46c3..4b823fbfe76a1a756e318a292f857c264f99dc8a 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -759,11 +759,9 @@ static void i915_ttm_adjust_lru(struct drm_i915_gem_object *obj)
        if (obj->mm.madv != I915_MADV_WILLNEED) {
                bo->priority = I915_TTM_PRIO_PURGE;
        } else if (!i915_gem_object_has_pages(obj)) {
-               if (bo->priority < I915_TTM_PRIO_HAS_PAGES)
-                       bo->priority = I915_TTM_PRIO_HAS_PAGES;
+               bo->priority = I915_TTM_PRIO_NO_PAGES;
        } else {
-               if (bo->priority > I915_TTM_PRIO_NO_PAGES)
-                       bo->priority = I915_TTM_PRIO_NO_PAGES;
+               bo->priority = I915_TTM_PRIO_HAS_PAGES;
        }
 
        ttm_bo_move_to_lru_tail(bo, bo->resource, NULL);