Re: [PATCH] ACPI/PRM: Deal with table not present or no module found
From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: 2021-08-06 13:23:43
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On Fri, Aug 6, 2021 at 2:48 AM Aubrey Li [off-list ref] wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- drivers/acpi/prmt.c | 6 ++++++ 1 file changed, 6 insertions(+)diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c index 31cf9ae..1f6007a 100644 --- a/drivers/acpi/prmt.c +++ b/drivers/acpi/prmt.c@@ -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, --
Applied as 5.14-rc material, thanks! However, since I'm on vacation next week, it will get into linux-next after -rc6.