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staging: 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.

Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rob Clark <robclark@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: dri-devel@lists.freedesktop.org
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erik Gilling 2013-02-28 16:43:19 -08:00 committed by Greg Kroah-Hartman
parent c679212dbf
commit eeb2f57163
1 changed files with 13 additions and 1 deletions
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14
drivers/staging/android/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);
@ -457,7 +463,13 @@ 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: