diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index d40f62d3645374e1fb06fffdd6f1b4026934911a..c072b212979cbad92f4c0b399ab5e7f4577a4bf4 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -370,6 +370,7 @@ int i965_reset(struct drm_device *dev, u8 flags)
 		}
 	} else {
 		DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
+		mutex_unlock(&dev->struct_mutex);
 		return -ENODEV;
 	}