1 files changed, 108 insertions, 10 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b998340e23d4..58ceb18ec997 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -33,6 +33,7 @@
 #include <linux/interrupt.h>
 #include <linux/kmod.h>
 #include <linux/delay.h>
+#include <linux/dmi.h>
 #include <linux/workqueue.h>
 #include <linux/nmi.h>
 #include <linux/acpi.h>
@@ -73,6 +74,21 @@ static void *acpi_irq_context;
 static struct workqueue_struct *kacpid_wq;
 static struct workqueue_struct *kacpi_notify_wq;
 
+#define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
+static char osi_additional_string[OSI_STRING_LENGTH_MAX];
+
+#define OSI_LINUX_ENABLED
+#ifdef  OSI_LINUX_ENABLED
+int osi_linux = 1;      /* enable _OSI(Linux) by default */
+#else
+int osi_linux;          /* disable _OSI(Linux) by default */
+#endif
+
+
+#ifdef CONFIG_DMI
+static struct __initdata dmi_system_id acpi_osl_dmi_table[];
+#endif
+
 static void __init acpi_request_region (struct acpi_generic_address *addr,
         unsigned int length, char *desc)
 {
@@ -121,8 +137,9 @@ static int __init acpi_reserve_resources(void)
 }
 device_initcall(acpi_reserve_resources);
 
-acpi_status acpi_os_initialize(void)
+acpi_status __init acpi_os_initialize(void)
 {
+        dmi_check_system(acpi_osl_dmi_table);
         return AE_OK;
 }
 
@@ -960,20 +977,38 @@ static int __init acpi_os_name_setup(char *str)
 
 __setup("acpi_os_name=", acpi_os_name_setup);
 
+static void enable_osi_linux(int enable) {
+
+        if (osi_linux != enable)
+                printk(KERN_INFO PREFIX "%sabled _OSI(Linux)\n",
+                        enable ? "En": "Dis");
+
+        osi_linux = enable;
+        return;
+}
+
 /*
- * _OSI control
+ * Modify the list of "OS Interfaces" reported to BIOS via _OSI
+ *
  * empty string disables _OSI
- * TBD additional string adds to _OSI
+ * string starting with '!' disables that string
+ * otherwise string is added to list, augmenting built-in strings
  */
 static int __init acpi_osi_setup(char *str)
 {
         if (str == NULL || *str == '\0') {
                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
                 acpi_gbl_create_osi_method = FALSE;
-        } else {
-                /* TBD */
-                printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n",
-                       str);
+        } else if (*str == '!') {
+                if (acpi_osi_invalidate(++str) == AE_OK)
+                        printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
+        } else if (!strcmp("!Linux", str)) {
+                enable_osi_linux(0);
+        } else if (!strcmp("Linux", str)) {
+                enable_osi_linux(1);
+        } else if (*osi_additional_string == '\0') {
+                strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
+                printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
         }
 
         return 1;
@@ -1143,11 +1178,28 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
 acpi_status
 acpi_os_validate_interface (char *interface)
 {
-
-    return AE_SUPPORT;
+        if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
+                return AE_OK;
+        if (!strcmp("Linux", interface)) {
+                printk(KERN_WARNING PREFIX
+                        "System BIOS is requesting _OSI(Linux)\n");
+#ifdef  OSI_LINUX_ENABLED
+                printk(KERN_WARNING PREFIX
+                        "Please test with \"acpi_osi=!Linux\"\n"
+                        "Please send dmidecode "
+                        "to linux-acpi@vger.kernel.org\n");
+#else
+                printk(KERN_WARNING PREFIX
+                        "If \"acpi_osi=Linux\" works better,\n"
+                        "Please send dmidecode "
+                        "to linux-acpi@vger.kernel.org\n");
+#endif
+                if(osi_linux)
+                        return AE_OK;
+        }
+        return AE_SUPPORT;
 }
 
-
 /******************************************************************************
  *
  * FUNCTION:    acpi_os_validate_address
@@ -1174,5 +1226,51 @@ acpi_os_validate_address (
     return AE_OK;
 }
 
+#ifdef CONFIG_DMI
+#ifdef  OSI_LINUX_ENABLED
+static int dmi_osi_not_linux(struct dmi_system_id *d)
+{
+        printk(KERN_NOTICE "%s detected: requires not _OSI(Linux)\n", d->ident);
+        enable_osi_linux(0);
+        return 0;
+}
+#else
+static int dmi_osi_linux(struct dmi_system_id *d)
+{
+        printk(KERN_NOTICE "%s detected: requires _OSI(Linux)\n", d->ident);
+        enable_osi_linux(1);
+        return 0;
+}
+#endif
+
+static struct dmi_system_id acpi_osl_dmi_table[] __initdata = {
+#ifdef  OSI_LINUX_ENABLED
+        /*
+         * Boxes that need NOT _OSI(Linux)
+         */
+        {
+         .callback = dmi_osi_not_linux,
+         .ident = "Toshiba Satellite P100",
+         .matches = {
+                     DMI_MATCH(DMI_BOARD_VENDOR, "TOSHIBA"),
+                     DMI_MATCH(DMI_BOARD_NAME, "Satellite P100"),
+                     },
+         },
+#else
+        /*
+         * Boxes that need _OSI(Linux)
+         */
+        {
+         .callback = dmi_osi_linux,
+         .ident = "Intel Napa CRB",
+         .matches = {
+                     DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
+                     DMI_MATCH(DMI_BOARD_NAME, "MPAD-MSAE Customer Reference Boards"),
+                     },
+         },
+#endif
+        {}
+};
+#endif /* CONFIG_DMI */
 
 #endif