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staging: sync: Reorder sync_fence_release

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Previously fence's pts were freed before the were the fence was removed from the
global fence list.  This led to a race with the debugfs support where it would
iterate over sync_pts that had been freed.

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 16:43:08 -08:00 committed by Greg Kroah-Hartman
parent 6e91f71986
commit cc3c5cdc7b
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/android/sync.c
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@ -520,12 +520,12 @@ static int sync_fence_release(struct inode *inode, struct file *file)
struct sync_fence *fence = file->private_data; struct sync_fence *fence = file->private_data;
unsigned long flags; unsigned long flags;
sync_fence_free_pts(fence);
spin_lock_irqsave(&sync_fence_list_lock, flags); spin_lock_irqsave(&sync_fence_list_lock, flags);
list_del(&fence->sync_fence_list); list_del(&fence->sync_fence_list);
spin_unlock_irqrestore(&sync_fence_list_lock, flags); spin_unlock_irqrestore(&sync_fence_list_lock, flags);
sync_fence_free_pts(fence);
kfree(fence); kfree(fence);
return 0; return 0;