[PATCH 23/26] drm/radeon: add missing locking to fence debugfs function

[Christian König]

Signed-off-by: Christian König <deathsimple at vodafone.de>
---
 drivers/gpu/drm/radeon/radeon_fence.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 66e6ee0..09e13e3 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -492,8 +492,10 @@ static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct radeon_device *rdev = dev->dev_private;
 	struct radeon_fence *fence;
+	unsigned long irq_flags;
 	int i;
 
+	read_lock_irqsave(&rdev->fence_lock, irq_flags);
 	for (i = 0; i < RADEON_NUM_RINGS; ++i) {
 		if (!rdev->fence_drv[i].initialized)
 			continue;
@@ -508,6 +510,7 @@ static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
 				   fence,  fence->seq);
 		}
 	}
+	read_unlock_irqrestore(&rdev->fence_lock, irq_flags);
 	return 0;
 }
 
-- 
1.7.5.4