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ACPI: PRM: Deal with table not present or no module found 

On the system PRMT table is not present, dmesg output:

	$ dmesg | grep PRM
	[    1.532237] ACPI: PRMT not present
	[    1.532237] PRM: found 4294967277 modules

The result of acpi_table_parse_entries need to be checked and return
immediately if PRMT table is not present or no PRM module found.

Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Aubrey Li 2021-08-06 08:46:24 +08:00 committed by Rafael J. Wysocki
parent 7c60610d47
commit 2bbfa0addd
1 changed files with 6 additions and 0 deletions
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6
drivers/acpi/prmt.c
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@ -292,6 +292,12 @@ void __init init_prmt(void)
int mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) +
sizeof (struct acpi_table_prmt_header),
0, acpi_parse_prmt, 0);
/*
* Return immediately if PRMT table is not present or no PRM module found.
*/
if (mc <= 0)
return;
pr_info("PRM: found %u modules\n", mc);
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,