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drm/i915/selftests: Lock the drm_mm while modifying

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

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190703091726.11690-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-07-03 10:17:13 +01:00
parent 63251685c1
commit 8221d21b06
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
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@ -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;