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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-12-04 19:45:27 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-12-04 20:30:44 +0300 |
| commit | 780ccb5a5a43a7787b7cbdc49f7660232fd26aaf (patch) | |
| tree | d30c429ffb62d1c9e9ca360bc8c54c646c1f4378 /drivers/gpu/drm/i915/gem/i915_gem_domain.c | |
| parent | aa5e4453dc055e188c792c3e5f1b256436332a59 (diff) | |
| download | linux-780ccb5a5a43a7787b7cbdc49f7660232fd26aaf.tar.xz | |
drm/i915/gem: Hold the obj->vma.lock while walking the vma.list
Remember to take the lock before walking the obj->vma.list so that the
nodes do not change beneath us! E.g.,
i915_gem_object_bump_inactive_ggtt:387 GEM_BUG_ON(vma->vm != &i915->ggtt.vm)
Closes: https://gitlab.freedesktop.org/drm/intel/issues/691
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191204164527.3872783-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_domain.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_domain.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c index f2064950622b..808eb327a29b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c @@ -379,8 +379,11 @@ static void i915_gem_object_bump_inactive_ggtt(struct drm_i915_gem_object *obj) struct i915_vma *vma; GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); + if (!atomic_read(&obj->bind_count)) + return; mutex_lock(&i915->ggtt.vm.mutex); + spin_lock(&obj->vma.lock); for_each_ggtt_vma(vma, obj) { if (!drm_mm_node_allocated(&vma->node)) continue; @@ -388,6 +391,7 @@ static void i915_gem_object_bump_inactive_ggtt(struct drm_i915_gem_object *obj) GEM_BUG_ON(vma->vm != &i915->ggtt.vm); list_move_tail(&vma->vm_link, &vma->vm->bound_list); } + spin_unlock(&obj->vma.lock); mutex_unlock(&i915->ggtt.vm.mutex); if (i915_gem_object_is_shrinkable(obj)) { |