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drm/msm: Small msm_gem_purge() fix 

Shoot down any mmap's *first* before put_pages().  Also add a WARN_ON
that the object is locked (to make it clear that this doesn't race with
msm_gem_fault()) and remove a redundant WARN_ON (since is_purgable()
already covers that case).

Fixes: 68209390f1 ("drm/msm: shrinker support")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20210405174532.1441497-8-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2021-04-05 10:45:30 -07:00
parent 64fcbde772
commit 81d4d597d4
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/msm/msm_gem.c
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@ -729,14 +729,16 @@ void msm_gem_purge(struct drm_gem_object *obj)
struct drm_device *dev = obj->dev;
struct msm_gem_object *msm_obj = to_msm_bo(obj);
GEM_WARN_ON(!msm_gem_is_locked(obj));
GEM_WARN_ON(!is_purgeable(msm_obj));
GEM_WARN_ON(obj->import_attach);
/* Get rid of any iommu mapping(s): */
put_iova_spaces(obj, true);
msm_gem_vunmap(obj);
drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
put_pages(obj);
put_iova_vmas(obj);
@ -744,7 +746,6 @@ void msm_gem_purge(struct drm_gem_object *obj)
msm_obj->madv = __MSM_MADV_PURGED;
update_inactive(msm_obj);
drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
drm_gem_free_mmap_offset(obj);
/* Our goal here is to return as much of the memory as