[Intel-gfx] [PATCH] drm/i915/gvt: Mark i915.enable_gvt as false if loading fails

[Chris Wilson]

If we update the value of i195.enable_gvt if we fail to load GVT
userspace can easily detect if when it fails to load as requested.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Zhi Wang <zhi.a.wang at intel.com>
---
 drivers/gpu/drm/i915/intel_gvt.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
index 9fa458c..434f4d5 100644
--- a/drivers/gpu/drm/i915/intel_gvt.c
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -63,7 +63,7 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
 
 	if (!is_supported_device(dev_priv)) {
 		DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
-		return 0;
+		goto bail;
 	}
 
 	/*
@@ -72,16 +72,20 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
 	ret = intel_gvt_init_host();
 	if (ret) {
 		DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
-		return 0;
+		goto bail;
 	}
 
 	ret = intel_gvt_init_device(dev_priv);
 	if (ret) {
 		DRM_DEBUG_DRIVER("Fail to init GVT device\n");
-		return 0;
+		goto bail;
 	}
 
 	return 0;
+
+bail:
+	i915.enable_gvt = 0;
+	return 0;
 }
 
 /**
-- 
2.8.1