FAILED: patch "[PATCH] drm/i915/gvt: Fix the kernel null pointer error" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: fred gao <[email protected]>
Date: Wed, 16 Aug 2017 15:48:03 +0800
Subject: [PATCH] drm/i915/gvt: Fix the kernel null pointer error

once error happens in shadow_indirect_ctx function, the variable wa_ctx->indirect_ctx.obj is not initialized but accessed, so the kernel null point panic occurs.

index 713848c36349..e556a46cd4c2 100644
@@ -2714,7 +2714,7 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 unmap_src:
 	i915_gem_object_unpin_map(obj);
 put_obj:
-	i915_gem_object_put(wa_ctx->indirect_ctx.obj);
+	i915_gem_object_put(obj);
 	return ret;
 }