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

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Message-Id: <1362098606-26469-22-git-send-email-john.stultz@linaro.org>
Date:	Thu, 28 Feb 2013 16:43:17 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Erik Gilling <konkers@...roid.com>,
	Maarten Lankhorst <maarten.lankhorst@...onical.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Rob Clark <robclark@...il.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	dri-devel@...ts.freedesktop.org,
	Android Kernel Team <kernel-team@...roid.com>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 21/30] staging: sync: Dump sync state on fence errors

From: Erik Gilling <konkers@...roid.com>

When we get a bad status, dump sync state

Cc: Maarten Lankhorst <maarten.lankhorst@...onical.com>
Cc: Erik Gilling <konkers@...roid.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Rob Clark <robclark@...il.com>
Cc: Sumit Semwal <sumit.semwal@...aro.org>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: dri-devel@...ts.freedesktop.org
Cc: Android Kernel Team <kernel-team@...roid.com>
Signed-off-by: Erik Gilling <konkers@...roid.com>
[jstultz: Added commit message]
Signed-off-by: John Stultz <john.stultz@...aro.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

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