staging: sync: Improve timeout dump messages

Improve the output of the timeout dumps, including
the fence pointer.

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>
[jstultz: Added commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/sync.c

@@ -576,6 +576,8 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
 		return fence->status;
 
 	if (fence->status == 0) {
+		pr_info("fence timeout on [%p] after %dms\n", fence,
+			jiffies_to_msecs(timeout));
 		sync_dump();
 		return -ETIME;
 	}
@@ -849,7 +851,8 @@ static void sync_print_fence(struct seq_file *s, struct sync_fence *fence)
 	struct list_head *pos;
 	unsigned long flags;
 
-	seq_printf(s, "%s: %s\n", fence->name, sync_status_str(fence->status));
+	seq_printf(s, "[%p] %s: %s\n", fence, fence->name,
+		   sync_status_str(fence->status));
 
 	list_for_each(pos, &fence->pt_list_head) {
 		struct sync_pt *pt =