[PATCH 21/30] staging: sync: Dump sync state on fence errors

[John Stultz]

From: Erik Gilling <konk...@android.com>

When we get a bad status, dump sync state

Cc: Maarten Lankhorst <maarten.lankhorst at canonical.com>
Cc: Erik Gilling <konkers at android.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Rob Clark <robclark at gmail.com>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: Greg KH <gregkh at linuxfoundation.org>
Cc: dri-devel at lists.freedesktop.org
Cc: Android Kernel Team <kernel-team at android.com>
Signed-off-by: Erik Gilling <konkers at android.com>
[jstultz: Added commit message]
Signed-off-by: John Stultz <john.stultz at linaro.org>
---
 drivers/staging/android/sync.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 92cdfe8..36ffa20 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -572,8 +572,11 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
        if (err < 0)
                return err;

-       if (fence->status < 0)
+       if (fence->status < 0) {
+               pr_info("fence error %d on [%p]\n", fence->status, fence);
+               sync_dump();
                return fence->status;
+       }

        if (fence->status == 0) {
                pr_info("fence timeout on [%p] after %dms\n", fence,
-- 
1.7.10.4