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| author | Aubrey Li <aubrey.li@intel.com> | 2021-09-08 18:55:45 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-09-08 20:56:57 +0200 |
| commit | 3265cc3ec52e75fc8daf189954cebda27ad26b2e (patch) | |
| tree | bbead7bcfacf8169f5115124a1f0b32899ce196c | |
| parent | 8e235ff9a1e3dc3d800224ab97bcd2418d3b19c3 (diff) | |
| download | linux-3265cc3ec52e75fc8daf189954cebda27ad26b2e.tar.gz | |
ACPI: PRM: Find PRMT table before parsing it
Find and verify PRMT before parsing it, which eliminates a
warning on machines without PRMT:
[ 7.197173] ACPI: PRMT not present
Fixes: cefc7ca46235 ("ACPI: PRM: implement OperationRegion handler for the PlatformRtMechanism subtype")
Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: 5.14+ <stable@vger.kernel.org> # 5.14+
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/prmt.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c index 1f6007abcf18e..89c22bc550570 100644 --- a/drivers/acpi/prmt.c +++ b/drivers/acpi/prmt.c @@ -288,10 +288,18 @@ invalid_guid: void __init init_prmt(void) { + struct acpi_table_header *tbl; acpi_status status; - int mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) + + int mc; + + status = acpi_get_table(ACPI_SIG_PRMT, 0, &tbl); + if (ACPI_FAILURE(status)) + return; + + mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) + sizeof (struct acpi_table_prmt_header), 0, acpi_parse_prmt, 0); + acpi_put_table(tbl); /* * Return immediately if PRMT table is not present or no PRM module found. */ |