linux-kernel - Re: [REGRESSION] in 6.18-rc1, failed to query a GPIO using a name in ACPI

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Message-ID: <1241f2b6-9b4e-4623-8a83-77db8774ac32@bootlin.com>
Date: Fri, 17 Oct 2025 10:50:05 +0200
From: Thomas Richard <thomas.richard@...tlin.com>
To: Sunil V L <sunilvl@...tanamicro.com>
Cc: rafael@...nel.org, regressions@...ts.linux.dev, lenb@...nel.org,
 linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 apatel@...tanamicro.com, Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 Daniele Cleri <DanieleCleri@...on.eu>
Subject: Re: [REGRESSION] in 6.18-rc1, failed to query a GPIO using a name in
 ACPI

On 10/17/25 12:22 AM, Sunil V L wrote:
> On Thu, Oct 16, 2025 at 02:47:40PM +0200, Thomas Richard wrote:
>> Hello,
>>
>> While testing the AAEON UpBoard MFD driver with the v6.18-rc1 release, I
>> noticed a regression. The driver does not probe anymore and I get the
>> following error:
>>
>> [    1.977831] upboard-fpga AANT0F01:00: error -ENOENT: Failed to
>> initialize FPGA common GPIOs
>> [    1.977854] upboard-fpga AANT0F01:00: probe with driver upboard-fpga
>> failed with error -2
>>
>> The driver fails to get some GPIOs using a name [1] in the ACPI tables [2].
>>
>> I did a bisect and I found the commit which introduced the regression:
>> e121be784d35 ("ACPI: property: Refactor acpi_fwnode_get_reference_args()
>> to support nargs_prop")
>>
> Hi Thomas,
> 
> Could you please try with below change and see if it resolves the issue?
> 
> diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
> index 1b997a5497e7..43d5e457814e 100644
> --- a/drivers/acpi/property.c
> +++ b/drivers/acpi/property.c
> @@ -1107,7 +1107,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
>                                        size_t num_args,
>                                        struct fwnode_reference_args *args)
>  {
> -       return acpi_fwnode_get_reference_args(fwnode, propname, NULL, index, num_args, args);
> +       return acpi_fwnode_get_reference_args(fwnode, propname, NULL, num_args, index, args);
>  }
> 

Hi Sunil,

Yes your change fixes the issue !!

Thanks,

Thomas