[3/8] ideapad: make sure we bind on the correct device

Commit Message

Ike Panhc Aug. 18, 2010, 8:37 a.m. UTC

None

Patch

diff --git a/drivers/platform/x86/ideapad_acpi.c b/drivers/platform/x86/ideapad_acpi.c
index 6176597..c1eec70 100644
--- a/drivers/platform/x86/ideapad_acpi.c
+++ b/drivers/platform/x86/ideapad_acpi.c
@@ -328,10 +328,18 @@  MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
 
 static int ideapad_acpi_add(struct acpi_device *adevice)
 {
-	int i;
+	int i, cfg;
 	int devs_present[5];
 	struct ideapad_private *priv;
 
+	if (read_method_int(adevice->handle, "_STA", &i))
+		return -ENODEV;
+	if (i != 0x0F)
+		return -ENODEV;
+
+	if (read_method_int(adevice->handle, "_CFG", &cfg))
+		return -ENODEV;
+
 	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
 		devs_present[i] = ideapad_dev_exists(i);
 		if (devs_present[i] < 0)