[PATCH] x86-64/i386: Don't process APICs/IO-APICs in ACPI when APIC is disabled.

[~andy/linux] / arch / i386 / kernel / acpi / boot.c

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index f1a21945963d77b80f125db518a432580647f10a..8dab3527bc97a9f8ac3965c8c0beb7db98ee224b 100644 (file)
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -215,7 +215,7 @@ static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
 {
        struct acpi_table_madt *madt = NULL;
 
-       if (!phys_addr || !size)
+       if (!phys_addr || !size || !cpu_has_apic)
                return -EINVAL;
 
        madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
@@ -668,10 +668,10 @@ unsigned long __init acpi_find_rsdp(void)
        unsigned long rsdp_phys = 0;
 
        if (efi_enabled) {
-               if (efi.acpi20)
-                       return __pa(efi.acpi20);
-               else if (efi.acpi)
-                       return __pa(efi.acpi);
+               if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
+                       return efi.acpi20;
+               else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
+                       return efi.acpi;
        }
        /*
         * Scan memory looking for the RSDP signature. First search EBDA (low
@@ -751,6 +751,9 @@ static int __init acpi_parse_madt_ioapic_entries(void)
                return -ENODEV;
        }
 
+       if (!cpu_has_apic)
+               return -ENODEV;
+
        /*
         * if "noapic" boot option, don't look for IO-APICs
         */