From: Li Chen <chenl311@chinatelecom.cn>
Date: Fri, 20 Jun 2025 13:13:07 +0000 (+0800)
Subject: ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is disabled
X-Git-Tag: v6.15.11~1
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a3a38cafa9c1cf42e41693547f765ce0857f5d6d;p=thirdparty%2Fkernel%2Fstable.git

ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is disabled

commit b9f58d3572a8e1ef707b941eae58ec4014b9269d upstream.

If CONFIG_ACPI_SPCR_TABLE is disabled, acpi_parse_spcr()
currently returns 0, which may incorrectly suggest that
SPCR parsing was successful. This patch changes the behavior
to return -ENODEV to clearly indicate that SPCR support
is not available.

This prepares the codebase for future changes that depend
on acpi_parse_spcr() failure detection, such as suppressing
misleading console messages.

Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/20250620131309.126555-2-me@linux.beauty
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index fc372bbaa5476..01c4c6e3924fc 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1491,7 +1491,7 @@ int acpi_parse_spcr(bool enable_earlycon, bool enable_console);
 #else
 static inline int acpi_parse_spcr(bool enable_earlycon, bool enable_console)
 {
-	return 0;
+	return -ENODEV;
 }
 #endif