diff options
Diffstat (limited to 'drivers/platform/x86/asus-wmi.c')
| -rw-r--r-- | drivers/platform/x86/asus-wmi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index d0f0931ea5eb..39ce3c1a7712 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -92,6 +92,7 @@ MODULE_LICENSE("GPL"); /* DSTS masks */ #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001 +#define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 @@ -270,6 +271,11 @@ static int asus_wmi_get_devstate_bits(u32 dev_id, u32 mask) if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT)) return -ENODEV; + if (mask == ASUS_WMI_DSTS_STATUS_BIT) { + if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT) + return -ENODEV; + } + return retval & mask; } |