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ACPI: Suppress misleading SPCR console message when SPCR table is absent

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The kernel currently alway prints:
"Use ACPI SPCR as default console: No/Yes "

even on systems that lack an SPCR table. This can
mislead users into thinking the SPCR table exists
on the machines without SPCR.

With this change, the "Yes" is only printed if
the SPCR table is present, parsed and !param_acpi_nospcr.
This avoids user confusion on SPCR-less systems.

Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/20250620131309.126555-3-me@linux.beauty
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Li Chen
2025-06-20 21:13:08 +08:00
committed by Catalin Marinas
parent b9f58d3572
commit bad3fa2fb9
1 changed files with 7 additions and 3 deletions
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10
arch/arm64/kernel/acpi.c
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@@ -197,6 +197,8 @@ out:
*/
void __init acpi_boot_table_init(void)
{
int ret;
/*
* Enable ACPI instead of device tree unless
* - ACPI has been disabled explicitly (acpi=off), or
@@ -250,10 +252,12 @@ done:
* behaviour, use acpi=nospcr to disable console in ACPI SPCR
* table as default serial console.
*/
acpi_parse_spcr(earlycon_acpi_spcr_enable,
ret = acpi_parse_spcr(earlycon_acpi_spcr_enable,
!param_acpi_nospcr);
pr_info("Use ACPI SPCR as default console: %s\n",
param_acpi_nospcr ? "No" : "Yes");
if (!ret || param_acpi_nospcr || !IS_ENABLED(CONFIG_ACPI_SPCR_TABLE))
pr_info("Use ACPI SPCR as default console: No\n");
else
pr_info("Use ACPI SPCR as default console: Yes\n");
if (IS_ENABLED(CONFIG_ACPI_BGRT))
acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);