By reading from method _CFG to make sure we bind on the correct VPC2004 device.

Signed-off-by: Ike Panhc <[email protected]>
---
 drivers/platform/x86/ideapad_acpi.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/ideapad_acpi.c 
b/drivers/platform/x86/ideapad_acpi.c
index 15d7e7e..9face93 100644
--- a/drivers/platform/x86/ideapad_acpi.c
+++ b/drivers/platform/x86/ideapad_acpi.c
@@ -326,10 +326,13 @@ 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, "_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)
-- 
1.7.1

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