[XS] Change in coreboot[main]: acpi: Zero-out MADT before filling it

[Matt DeVillier (Code Review)]

Matt DeVillier has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86246?usp=email )

Change subject: acpi: Zero-out MADT before filling it
......................................................................

acpi: Zero-out MADT before filling it

Otherwise flags field is pre-filled with random garbage.

Change-Id: Ie5dc0720183b8ba07561341003f28a86ffce911e
Signed-off-by: Vladimir Serbinenko 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86246
Tested-by: build bot (Jenkins) 
Reviewed-by: Patrick Rudolph 
Reviewed-by: Jérémy Compostella 
---
M src/acpi/acpi.c
1 file changed, 2 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Patrick Rudolph: Looks good to me, approved
  Jérémy Compostella: Looks good to me, approved

diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c
index ffd9b79..8f5c09f 100644
--- a/src/acpi/acpi.c
+++ b/src/acpi/acpi.c
@@ -138,6 +138,8 @@
    acpi_madt_t *madt = (acpi_madt_t *)header;
    unsigned long current = (unsigned long)madt + sizeof(acpi_madt_t);

+	memset(madt, 0, sizeof(*madt));
+
    if (acpi_fill_header(header, "APIC", MADT, sizeof(acpi_madt_t)) != CB_SUCCESS)
    	return;