Commit aafa719d authored by Corentin Chary's avatar Corentin Chary Committed by Matthew Garrett

eeepc-wmi: use the presence bit correctly

I checked some more DSDT, and it seems that I wasn't
totally right about the meaning of DSTS return value.
Bit 0 is clearly the status of the device, and I discovered
that bit 16 is set when the device is present.
Signed-off-by: default avatarCorentin Chary <corentincj@iksaif.net>
Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
parent 33e0e6fe
......@@ -75,6 +75,9 @@ MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
#define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012
#define EEEPC_WMI_DEVID_TPDLED 0x00100011
#define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001
#define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000
static bool hotplug_wireless;
module_param(hotplug_wireless, bool, 0444);
......@@ -265,16 +268,10 @@ static int eeepc_wmi_get_devstate_simple(u32 dev_id)
if (ACPI_FAILURE(status))
return -EINVAL;
/* If the device is present, DSTS will always set some bits
* 0x00070000 - 1110000000000000000 - device supported
* 0x00060000 - 1100000000000000000 - not supported
* 0x00020000 - 0100000000000000000 - device supported
* 0x00010000 - 0010000000000000000 - not supported / special mode ?
*/
if (!retval || retval == 0x00060000)
if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT))
return -ENODEV;
return retval & 0x1;
return retval & EEEPC_WMI_DSTS_STATUS_BIT;
}
/*
......
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