[patch NOT added to the 3.12 stable tree] drm/vmwgfx: Fix query buffer locking order violation

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From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>

This patch does NOT apply to the 3.12 stable tree. If you still want
it applied, please provide a backport.

===============

commit c8e5e010ef12df6707a1d711a5279a22f67a355e upstream.

The query buffers were reserved while holding the binding mutex, which
caused a circular locking dependency.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reviewed-by: Brian Paul <brianp@xxxxxxxxxx>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_context.c b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c
index 701d5207def6..8bb26dcd9eae 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_context.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_context.c
@@ -117,10 +117,10 @@ static void vmw_hw_context_destroy(struct vmw_resource *res)
 		(void) vmw_context_binding_state_kill
 			(&container_of(res, struct vmw_user_context, res)->cbs);
 		(void) vmw_gb_context_destroy(res);
+		mutex_unlock(&dev_priv->binding_mutex);
 		if (dev_priv->pinned_bo != NULL &&
 		    !dev_priv->query_cid_valid)
 			__vmw_execbuf_release_pinned_bo(dev_priv, NULL);
-		mutex_unlock(&dev_priv->binding_mutex);
 		mutex_unlock(&dev_priv->cmdbuf_mutex);
 		return;
 	}
-- 
1.9.3

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