Signed-off-by: Zhao Yakui <yakui.z...@intel.com>
Reviewed-by: Imre Deak <imre.d...@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |    2 +-
 drivers/gpu/drm/i915/intel_ringbuffer.h    |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c 
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 3491402..341ec68 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1035,7 +1035,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
        if (args->flags & I915_EXEC_IS_PINNED)
                flags |= I915_DISPATCH_PINNED;
 
-       if ((args->flags & I915_EXEC_RING_MASK) > I915_NUM_RINGS) {
+       if ((args->flags & I915_EXEC_RING_MASK) > LAST_USER_RING) {
                DRM_DEBUG("execbuf with unknown ring: %d\n",
                          (int)(args->flags & I915_EXEC_RING_MASK));
                return -EINVAL;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h 
b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 413cdc7..ec9d978 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -63,6 +63,7 @@ struct  intel_ring_buffer {
                VECS,
        } id;
 #define I915_NUM_RINGS 4
+#define LAST_USER_RING (VECS + 1)
        u32             mmio_base;
        void            __iomem *virtual_start;
        struct          drm_device *dev;
-- 
1.7.10.1

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