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| author | Chris Chiu <chiu@endlessm.com> | 2020-05-22 09:44:24 +0200 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-06-01 11:27:25 +0200 |
| commit | 7b91f1565fbfbe5a162d91f8a1f6c5580c2fc1d0 (patch) | |
| tree | fb523668b8b457ab3dbdacb4e14e7b6fda753501 /drivers/platform | |
| parent | platform/x86: intel-vbtn: Only blacklist SW_TABLET_MODE on the 9 / "Laptop" c... (diff) | |
| download | linux-7b91f1565fbfbe5a162d91f8a1f6c5580c2fc1d0.tar.xz linux-7b91f1565fbfbe5a162d91f8a1f6c5580c2fc1d0.zip | |
platform/x86: asus_wmi: Reserve more space for struct bias_args
On the ASUS laptop UX325JA/UX425JA, most of the media keys are not
working due to the ASUS WMI driver fails to be loaded. The ACPI error
as follows leads to the failure of asus_wmi_evaluate_method.
ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Field [IIA3] at bit offset/length 96/32 exceeds size of target Buffer (96 bits) (20200326/dsopcode-203)
No Local Variables are initialized for Method [WMNB]
ACPI Error: Aborting method \_SB.ATKD.WMNB due to previous error (AE_AML_BUFFER_LIMIT) (20200326/psparse-531)
The DSDT for the WMNB part shows that 5 DWORD required for local
variables and the 3rd variable IIA3 hit the buffer limit.
Method (WMNB, 3, Serialized)
{ ..
CreateDWordField (Arg2, Zero, IIA0)
CreateDWordField (Arg2, 0x04, IIA1)
CreateDWordField (Arg2, 0x08, IIA2)
CreateDWordField (Arg2, 0x0C, IIA3)
CreateDWordField (Arg2, 0x10, IIA4)
Local0 = (Arg1 & 0xFFFFFFFF)
If ((Local0 == 0x54494E49))
..
}
The limitation is determined by the input acpi_buffer size passed
to the wmi_evaluate_method. Since the struct bios_args is the data
structure used as input buffer by default for all ASUS WMI calls,
the size needs to be expanded to fix the problem.
Signed-off-by: Chris Chiu <chiu@endlessm.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/asus-wmi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index a97aba2ba467..877aade19497 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -117,6 +117,8 @@ struct bios_args { u32 arg0; u32 arg1; u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */ + u32 arg4; + u32 arg5; } __packed; /* |