[PATCH 4.19 03/15] ACPI: x86: Call acpi_boot_table_init() after acpi_table_upgrade()

[Greg Kroah-Hartman]

From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

commit 6998a8800d73116187aad542391ce3b2dd0f9e30 upstream.

Commit 1a1c130ab757 ("ACPI: tables: x86: Reserve memory occupied by
ACPI tables") attempted to address an issue with reserving the memory
occupied by ACPI tables, but it broke the initrd-based table override
mechanism relied on by multiple users.

To restore the initrd-based ACPI table override functionality, move
the acpi_boot_table_init() invocation in setup_arch() on x86 after
the acpi_table_upgrade() one.

Fixes: 1a1c130ab757 ("ACPI: tables: x86: Reserve memory occupied by ACPI tables")
Reported-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Tested-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: George Kennedy <george.kennedy@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/x86/kernel/setup.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1097,9 +1097,6 @@ void __init setup_arch(char **cmdline_p)
 
 	cleanup_highmap();
 
-	/* Look for ACPI tables and reserve memory occupied by them. */
-	acpi_boot_table_init();
-
 	memblock_set_current_limit(ISA_END_ADDRESS);
 	e820__memblock_setup();
 
@@ -1179,6 +1176,8 @@ void __init setup_arch(char **cmdline_p)
 	reserve_initrd();
 
 	acpi_table_upgrade();
+	/* Look for ACPI tables and reserve memory occupied by them. */
+	acpi_boot_table_init();
 
 	vsmp_init();