1 files changed, 5 insertions, 1 deletions

diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index 1649a175a206..fe799b11ac0a 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -48,7 +48,11 @@ void __init check_acpi_pci(void)
         int num, slot, func;
 
         /* Assume the machine supports type 1. If not it will 
-           always read ffffffff and should not have any side effect. */
+           always read ffffffff and should not have any side effect.
+           Actually a few buggy systems can machine check. Allow the user
+           to disable it by command line option at least -AK */
+        if (!early_pci_allowed())
+                return;
 
         /* Poor man's PCI discovery */
         for (num = 0; num < 32; num++) {