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Blame SOURCES/edk2-OvmfPkg-QemuRamfbDxe-Do-not-report-DXE-failure-on-Aa.patch

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From aaaedc1e2cfd55ef003fb1b5a37c73a196b26dc7 Mon Sep 17 00:00:00 2001
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From: Philippe Mathieu-Daude <philmd@redhat.com>
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Date: Thu, 1 Aug 2019 20:43:48 +0200
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Subject: [PATCH 2/3] OvmfPkg: QemuRamfbDxe: Do not report DXE failure on
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 Aarch64 silent builds (RH only)
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Message-id: <20190801184349.28512-3-philmd@redhat.com>
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Patchwork-id: 89861
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O-Subject:  [RHEL-8.1.0 edk2 PATCH v4 2/3] OvmfPkg: QemuRamfbDxe: Do not report
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	DXE failure on Aarch64 silent builds (RH only)
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Bugzilla: 1714446
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Acked-by: Andrew Jones <drjones@redhat.com>
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Acked-by: Laszlo Ersek <lersek@redhat.com>
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To suppress an error message on the silent build when ramfb is
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not configured, change QemuRamfbDxe to return EFI_SUCCESS even
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when it fails.
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Some memory is wasted (driver stays resident without
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any good use), but it is mostly harmless, as the memory
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is released by the OS after ExitBootServices().
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Suggested-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Philippe Mathieu-Daude <philmd@redhat.com>
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---
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 OvmfPkg/QemuRamfbDxe/QemuRamfb.c      | 14 ++++++++++++++
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 OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf |  1 +
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 2 files changed, 15 insertions(+)
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diff --git a/OvmfPkg/QemuRamfbDxe/QemuRamfb.c b/OvmfPkg/QemuRamfbDxe/QemuRamfb.c
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index b49f2ca..c27e55f 100644
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--- a/OvmfPkg/QemuRamfbDxe/QemuRamfb.c
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+++ b/OvmfPkg/QemuRamfbDxe/QemuRamfb.c
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@@ -20,6 +20,7 @@
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 #include <Library/BaseLib.h>
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 #include <Library/BaseMemoryLib.h>
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 #include <Library/DebugLib.h>
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+#include <Library/DebugPrintErrorLevelLib.h>
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 #include <Library/DevicePathLib.h>
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 #include <Library/FrameBufferBltLib.h>
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 #include <Library/MemoryAllocationLib.h>
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@@ -249,6 +250,19 @@ InitializeQemuRamfb (
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   Status = QemuFwCfgFindFile ("etc/ramfb", &mRamfbFwCfgItem, &FwCfgSize);
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   if (EFI_ERROR (Status)) {
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+#if defined (MDE_CPU_AARCH64)
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+    //
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+    // RHBZ#1714446
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+    // If no ramfb device was configured, this platform DXE driver should
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+    // returns EFI_NOT_FOUND, so the DXE Core can unload it. However, even
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+    // using a silent build, an error message is issued to the guest console.
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+    // Since this confuse users, return success and stay resident. The wasted
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+    // guest RAM still gets freed later after ExitBootServices().
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+    //
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+    if (GetDebugPrintErrorLevel () == DEBUG_ERROR) {
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+      return EFI_SUCCESS;
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+    }
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+#endif
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     return EFI_NOT_FOUND;
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   }
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   if (FwCfgSize != sizeof (RAMFB_CONFIG)) {
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diff --git a/OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf b/OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf
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index 013edef..f9e24cb 100644
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--- a/OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf
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+++ b/OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf
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@@ -36,6 +36,7 @@
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   BaseLib
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   BaseMemoryLib
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   DebugLib
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+  DebugPrintErrorLevelLib
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   DevicePathLib
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   FrameBufferBltLib
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   MemoryAllocationLib
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-- 
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1.8.3.1
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