From: Li Chen <me@linux.beauty>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>, Hanjun Guo <guohanjun@huawei.com>,
Liu Wei <liuwei09@cestc.cn>, Ryan Roberts <ryan.roberts@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Li Chen <chenl311@chinatelecom.cn>,
Sudeep Holla <sudeep.holla@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: [PATCH 1/2] ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is disabled
Date: Fri, 6 Jun 2025 15:27:44 +0800 [thread overview]
Message-ID: <20250606072802.191580-2-me@linux.beauty> (raw)
In-Reply-To: <20250606072802.191580-1-me@linux.beauty>
From: Li Chen <chenl311@chinatelecom.cn>
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>
---
include/linux/acpi.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index f102c0fe34318..71e692f952905 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1503,7 +1503,7 @@ 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
--
2.49.0
next prev parent reply other threads:[~2025-06-06 7:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-06 7:27 [PATCH 0/2] ACPI: Improve SPCR handling and messaging on SPCR-less systems Li Chen
2025-06-06 7:27 ` Li Chen [this message]
2025-06-06 7:27 ` [PATCH 2/2] ACPI: Suppress misleading SPCR console message when SPCR table is absent Li Chen
2025-06-19 14:54 ` Hanjun Guo
2025-06-19 11:49 ` [PATCH 0/2] ACPI: Improve SPCR handling and messaging on SPCR-less systems Li Chen
2025-06-19 14:42 ` Hanjun Guo
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