From d6bcb5c9f30fffa1a27d04a4fd31e9b4467cd1b4 Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Mar 14 2016 11:50:11 +0000
Subject: OvmfPkg: VirtioRngDxe: clear all feature bits more explicitly


This too is in preparation for the following patches.

After this patch, all four drivers manage their feature bits with explicit
masking.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>

---

diff --git a/OvmfPkg/VirtioRngDxe/VirtioRng.c b/OvmfPkg/VirtioRngDxe/VirtioRng.c
index 290bdde..d916534 100644
--- a/OvmfPkg/VirtioRngDxe/VirtioRng.c
+++ b/OvmfPkg/VirtioRngDxe/VirtioRng.c
@@ -294,7 +294,8 @@ VirtioRngInit (
   // currently defined for VirtioRng, and no generic features are needed by
   // this driver.
   //
-  Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, 0);
+  Features &= 0;
+  Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);
   if (EFI_ERROR (Status)) {
     goto ReleaseQueue;
   }