linux-kernel - [PATCH 5.17 0131/1126] ACPI: properties: Consistently return -ENOENT if there are no more references

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Message-Id: <20220405070411.422867282@linuxfoundation.org>
Date:   Tue,  5 Apr 2022 09:14:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 5.17 0131/1126] ACPI: properties: Consistently return -ENOENT if there are no more references

From: Sakari Ailus <sakari.ailus@...ux.intel.com>

commit babc92da5928f81af951663fc436997352e02d3a upstream.

__acpi_node_get_property_reference() is documented to return -ENOENT if
the caller requests a property reference at an index that does not exist,
not -EINVAL which it actually does.

Fix this by returning -ENOENT consistenly, independently of whether the
property value is a plain reference or a package.

Fixes: c343bc2ce2c6 ("ACPI: properties: Align return codes of __acpi_node_get_property_reference()")
Cc: 4.14+ <stable@...r.kernel.org> # 4.14+
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/acpi/property.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -685,7 +685,7 @@ int __acpi_node_get_property_reference(c
 	 */
 	if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) {
 		if (index)
-			return -EINVAL;
+			return -ENOENT;
 
 		device = acpi_fetch_acpi_dev(obj->reference.handle);
 		if (!device)