Messages in this thread Patch in this message | | | From | Aubrey Li <> | Subject | [PATCH v2] ACPI/PRM: Find PRMT table before parse it | Date | Wed, 8 Sep 2021 18:55:45 +0800 |
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Find and verify PRMT table before parse it, this eliminates a warning on machines without PRMT table.
[ 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> --- drivers/acpi/prmt.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c index 1f6007a..89c22bc 100644 --- a/drivers/acpi/prmt.c +++ b/drivers/acpi/prmt.c @@ -288,10 +288,18 @@ static acpi_status acpi_platformrt_space_handler(u32 function, 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. */ -- 2.7.4
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