From b16f257cd3671700e1ef11997db8c5a35a09b89b Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon, 8 Apr 2024 12:42:06 +0200
Subject: [PATCH] Revert "x86/mpparse: Register APIC address only once"

BugLink: https://bugs.launchpad.net/bugs/2065400

This reverts commit 3428faa0d675f6a6284331731b762dc041011b3c which is
commit f2208aa12c27bfada3c15c550c03ca81d42dcac2 upstream.

It is reported to cause problems in the stable branches, so revert it.

Link: https://lore.kernel.org/r/899b7c1419a064a2b721b78eade06659@stwm.de
Reported-by: Wolfgang Walter <linux@stwm.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
---
 arch/x86/kernel/mpparse.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 15c700d35870..b223922248e9 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -196,12 +196,12 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 	if (!smp_check_mpc(mpc, oem, str))
 		return 0;
 
-	if (early) {
-		/* Initialize the lapic mapping */
-		if (!acpi_lapic)
-			register_lapic_address(mpc->lapic);
+	/* Initialize the lapic mapping */
+	if (!acpi_lapic)
+		register_lapic_address(mpc->lapic);
+
+	if (early)
 		return 1;
-	}
 
 	/* Now process the configuration blocks. */
 	while (count < mpc->length) {