Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / arch / x86 / kernel / reboot.c

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 08c44b0..9242436 100644 (file)
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -36,7 +36,7 @@ EXPORT_SYMBOL(pm_power_off);
 
 static const struct desc_ptr no_idt = {};
 static int reboot_mode;
-enum reboot_type reboot_type = BOOT_KBD;
+enum reboot_type reboot_type = BOOT_ACPI;
 int reboot_force;
 
 #if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
@@ -294,6 +294,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                        DMI_MATCH(DMI_BOARD_NAME, "VersaLogic Menlow board"),
                },
        },
+       { /* Handle reboot issue on Acer Aspire one */
+               .callback = set_bios_reboot,
+               .ident = "Acer Aspire One A110",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
+               },
+       },
        { }
 };
 
@@ -411,6 +419,30 @@ static struct dmi_system_id __initdata pci_reboot_dmi_table[] = {
                        DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"),
                },
        },
+       {       /* Handle problems with rebooting on the Latitude E6320. */
+               .callback = set_pci_reboot,
+               .ident = "Dell Latitude E6320",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"),
+               },
+       },
+       {       /* Handle problems with rebooting on the Latitude E5420. */
+               .callback = set_pci_reboot,
+               .ident = "Dell Latitude E5420",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"),
+               },
+       },
+       {       /* Handle problems with rebooting on the Latitude E6420. */
+               .callback = set_pci_reboot,
+               .ident = "Dell Latitude E6420",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"),
+               },
+       },
        { }
 };
 
@@ -478,9 +510,24 @@ void __attribute__((weak)) mach_reboot_fixups(void)
 {
 }
 
+/*
+ * Windows compatible x86 hardware expects the following on reboot:
+ *
+ * 1) If the FADT has the ACPI reboot register flag set, try it
+ * 2) If still alive, write to the keyboard controller
+ * 3) If still alive, write to the ACPI reboot register again
+ * 4) If still alive, write to the keyboard controller again
+ *
+ * If the machine is still alive at this stage, it gives up. We default to
+ * following the same pattern, except that if we're still alive after (4) we'll
+ * try to force a triple fault and then cycle between hitting the keyboard
+ * controller and doing that
+ */
 static void native_machine_emergency_restart(void)
 {
        int i;
+       int attempt = 0;
+       int orig_reboot_type = reboot_type;
 
        if (reboot_emergency)
                emergency_vmx_disable_all();
@@ -502,6 +549,13 @@ static void native_machine_emergency_restart(void)
                                outb(0xfe, 0x64); /* pulse reset low */
                                udelay(50);
                        }
+                       if (attempt == 0 && orig_reboot_type == BOOT_ACPI) {
+                               attempt = 1;
+                               reboot_type = BOOT_ACPI;
+                       } else {
+                               reboot_type = BOOT_TRIPLE;
+                       }
+                       break;
 
                case BOOT_TRIPLE:
                        load_idt(&no_idt);