drm/i915/selftests: Lock the drm_mm while modifying (8221d21b) · Commits · 戴 / test

Remember to lock the drm_mm as we modify it, lest it be modified in the background by retire/free workers! Signed-off-by:

drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -414,7 +414,9 @@ static int igt_mmap_offset_exhaustion(void *arg)
		drm_mm_for_each_hole(hole, mm, hole_start, hole_end) {
		resv.start = hole_start;
		resv.size = hole_end - hole_start - 1; /* PAGE_SIZE units */
		mutex_lock(&i915->drm.struct_mutex);
		err = drm_mm_reserve_node(mm, &resv);
		mutex_unlock(&i915->drm.struct_mutex);
		if (err) {
		pr_err("Failed to trim VMA manager, err=%d\n", err);
		goto out_park;
		@@ -478,7 +480,9 @@ static int igt_mmap_offset_exhaustion(void *arg)
		}

		out:
		mutex_lock(&i915->drm.struct_mutex);
		drm_mm_remove_node(&resv);
		mutex_unlock(&i915->drm.struct_mutex);
		out_park:
		restore_retire_worker(i915);
		return err;