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

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Message-ID: <aPFwPR2A0CN6k1Vl@sunil-laptop>
Date: Fri, 17 Oct 2025 03:52:53 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: Thomas Richard <thomas.richard@...tlin.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 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);
 }

Thanks,
Sunil