x86: cleanup for setup code crashes during IST probe

[pandora-kernel.git] / arch / x86 / boot / main.c

diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 2296164..197421d 100644 (file)
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -73,6 +73,11 @@ static void keyboard_set_repeat(void)
  */
 static void query_ist(void)
 {
+       /* Some older BIOSes apparently crash on this call, so filter
+          it from machines too old to have SpeedStep at all. */
+       if (cpu.level < 6)
+               return;
+
        asm("int $0x15"
            : "=a" (boot_params.ist_info.signature),
              "=b" (boot_params.ist_info.command),