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drm/msm: Implement .gem_free_object_unlocked

Telusuri Sumber 
We use a llist and a worker to delay the object cleanup. This avoids
taking mmap_sem and struct mutex in the wrong order when calling
drm_gem_object_put-unlocked() from drm_gem_mmap().

Fixes lockdep problem with copy_from_user() in msm_ioctl_gem_submit().

Change-Id: Idfe54ae8108158b69f3835f26991642d1e21f8ee
Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Git-commit: 48e7f18392c66f9b69ebac11c54f1a2e033ced54
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[samtran@codeaurora.org: resolve trivial merge conflict]
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
This commit is contained in:
Kristian H. Kristensen
2021-03-23 13:35:31 -07:00
committed by Samantha Tran
orang tua 19e9831a45
melakukan a145e793b2
4 mengubah file dengan 42 tambahan dan 0 penghapusan
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msm/msm_drv.c
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@@ -792,6 +792,9 @@ static int msm_drm_component_init(struct device *dev)
priv->wq = alloc_ordered_workqueue("msm_drm", 0);
init_waitqueue_head(&priv->pending_crtcs_event);
INIT_WORK(&priv->free_work, msm_gem_free_work);
init_llist_head(&priv->free_list);
INIT_LIST_HEAD(&priv->client_event_list);
INIT_LIST_HEAD(&priv->inactive_list);
INIT_LIST_HEAD(&priv->vm_client_list);