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sync: update new fence status with sync_fence_signal_pt

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If a fence's pt is signaled before sync_fence_create is called, the fence
will never transition into the signaled state.  This also address a tiny
race if a merged fence's pt after sync_fence_get_status checks it's status
and before fence->status is updated.

Change-Id: Ic8e292a323db26c6f04cb4757d920278b3125ff6
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling
2012-10-15 17:51:01 -07:00
committed by 黄涛
parent e3ab954943
commit 2211c10437
1 changed files with 13 additions and 1 deletions
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14
drivers/base/sync.c
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@@ -295,6 +295,12 @@ struct sync_fence *sync_fence_create(const char *name, struct sync_pt *pt)
list_add(&pt->pt_list, &fence->pt_list_head);
sync_pt_activate(pt);
/*
* signal the fence in case pt was activated before
* sync_pt_activate(pt) was called
*/
sync_fence_signal_pt(pt);
return fence;
}
EXPORT_SYMBOL(sync_fence_create);
@@ -456,7 +462,13 @@ struct sync_fence *sync_fence_merge(const char *name,
if (err < 0)
goto err;
fence->status = sync_fence_get_status(fence);
/*
* signal the fence in case one of it's pts were activated before
* they were activated
*/
sync_fence_signal_pt(list_first_entry(&fence->pt_list_head,
struct sync_pt,
pt_list));
return fence;
err: