asus-laptop: let WLED alone on L1400B

Asus took the DSDT from another model (L84F), made some change
to make it work, but forgot to remove WLED method (the laptop
doesn't have a wireless card). They even didn't change the model
name.

ref: https://bugzilla.kernel.org/show_bug.cgi?id=25712

Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 5a6f7d7575d6..2b9d7b8636e3 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -50,6 +50,7 @@
 #include <linux/input/sparse-keymap.h>
 #include <linux/rfkill.h>
 #include <linux/slab.h>
+#include <linux/dmi.h>
 #include <acpi/acpi_drivers.h>
 #include <acpi/acpi_bus.h>
 
@@ -1557,6 +1558,20 @@ static int __devinit asus_acpi_init(struct asus_laptop *asus)
         return result;
 }
 
+static void __devinit asus_dmi_check(void)
+{
+        const char *model;
+
+        model = dmi_get_system_info(DMI_PRODUCT_NAME);
+        if (!model)
+                return;
+
+        /* On L1400B WLED control the sound card, don't mess with it ... */
+        if (strncmp(model, "L1400B", 6) == 0) {
+                wlan_status = -1;
+        }
+}
+
 static bool asus_device_present;
 
 static int __devinit asus_acpi_add(struct acpi_device *device)
@@ -1575,6 +1590,8 @@ static int __devinit asus_acpi_add(struct acpi_device *device)
         device->driver_data = asus;
         asus->device = device;
 
+        asus_dmi_check();
+
         result = asus_acpi_init(asus);
         if (result)
                 goto fail_platform;