From a208c6ce732a58c44bb2bf105d5e664f0887d5fe Mon Sep 17 00:00:00 2001 From: Angel Pons Date: Mon, 13 Jul 2020 00:02:34 +0200 Subject: src: Never overwrite `fadt->flags` Instead, just flip the desired bits using bitwise operations. As this is initially zero, the resulting value is the same. This allows flags to be set from anywhere regardless of execution order. Tested on Asus P8Z77-V LX2 with Linux 5.7.6 and Windows 10 at the end of the patch train, both operating systems are able to boot successfully. Change-Id: Icfd580a20524936cd0adac574331b09fb2aea925 Signed-off-by: Angel Pons Reviewed-on: https://review.coreboot.org/c/coreboot/+/43387 Reviewed-by: Nico Huber Tested-by: build bot (Jenkins) --- src/southbridge/intel/i82801dx/fadt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/southbridge/intel/i82801dx') diff --git a/src/southbridge/intel/i82801dx/fadt.c b/src/southbridge/intel/i82801dx/fadt.c index 319e6a6f88..8be39bfdb6 100644 --- a/src/southbridge/intel/i82801dx/fadt.c +++ b/src/southbridge/intel/i82801dx/fadt.c @@ -50,7 +50,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt) fadt->century = 0x00; fadt->iapc_boot_arch = 0x03; - fadt->flags = ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED | + fadt->flags |= ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED | ACPI_FADT_C2_MP_SUPPORTED | ACPI_FADT_SLEEP_BUTTON | ACPI_FADT_S4_RTC_WAKE | ACPI_FADT_RESET_REGISTER | ACPI_FADT_PLATFORM_CLOCK; -- cgit v1.2.3