From 765d96e8ebc6f45b345e8a446516c973792914ab Mon Sep 17 00:00:00 2001
From: Joshua Foster <joshua.foster@lmco.com>
Date: Thu, 9 Jul 2020 10:34:48 -0400
Subject: [PATCH] unset HardwareConfig.Firmware since CreateConfig.Firmware
 configures the firmware in StepCreateVM

---
 builder/vsphere/iso/builder.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/builder/vsphere/iso/builder.go b/builder/vsphere/iso/builder.go
index 1ae3fc1f0..2f65200f4 100644
--- a/builder/vsphere/iso/builder.go
+++ b/builder/vsphere/iso/builder.go
@@ -60,6 +60,11 @@ func (b *Builder) Run(ctx context.Context, ui packer.Ui, hook packer.Hook) (pack
 		)
 	}
 
+	// default Firmware to "" since it is already configured by the CreateConfig.Firmware
+	if b.config.CreateConfig.Firmware != "" {
+		b.config.HardwareConfig.Firmware = ""
+	}
+
 	steps = append(steps,
 		&StepCreateVM{
 			Config:   &b.config.CreateConfig,