From ddaf39263a1ed84e60238622dfed83ff14ecc50a Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 12 Mar 2024 16:12:09 +0100
Subject: EmbeddedPkg/NonCoherentIoMmuDxe: Make SetAttributes always succeed

NonCoherentIoMmuSetAttribute() does nothing except return
EFI_UNSUPPORTED. This was fine when it was introduced, but now, the PCI
bus driver will fail a PCI I/O Map() operation if the call to
SetAttributes() fails.

So return EFI_SUCCESS instead.

Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Abner Chang <abner.chang@amd.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
---
 EmbeddedPkg/Drivers/NonCoherentIoMmuDxe/NonCoherentIoMmuDxe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'EmbeddedPkg')

diff --git a/EmbeddedPkg/Drivers/NonCoherentIoMmuDxe/NonCoherentIoMmuDxe.c b/EmbeddedPkg/Drivers/NonCoherentIoMmuDxe/NonCoherentIoMmuDxe.c
index 4e7a5698c1..f02a76a62e 100644
--- a/EmbeddedPkg/Drivers/NonCoherentIoMmuDxe/NonCoherentIoMmuDxe.c
+++ b/EmbeddedPkg/Drivers/NonCoherentIoMmuDxe/NonCoherentIoMmuDxe.c
@@ -70,7 +70,7 @@ NonCoherentIoMmuSetAttribute (
   IN UINT64                IoMmuAccess
   )
 {
-  return EFI_UNSUPPORTED;
+  return EFI_SUCCESS;
 }
 
 /**
-- 
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