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 <[email protected]>
---
drivers/platform/x86/asus-wmi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index bb7c529d7d16..cd212ee210e2 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -116,6 +116,8 @@ struct bios_args {
u32 arg0;
u32 arg1;
u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */
+ u32 arg4;
+ u32 arg5;
} __packed;
/*
--
2.25.2
Hi,
On 5/22/20 9:44 AM, Chris Chiu wrote:
> 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 <[email protected]>
Thank you, patch looks good to me:
Reviewed-by: Hans de Goede <[email protected]>
Regards,
Hans
> ---
> drivers/platform/x86/asus-wmi.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index bb7c529d7d16..cd212ee210e2 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -116,6 +116,8 @@ struct bios_args {
> u32 arg0;
> u32 arg1;
> u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */
> + u32 arg4;
> + u32 arg5;
> } __packed;
>
> /*
>