From b66f86849414807745b5c2129e2de5f27a788c9f Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Thu, 25 Nov 2021 11:36:16 +0100 Subject: [PATCH] ACPI: EC: Mark the ec_sys write_support param as module_param_hw() Using write_support=1 with the ec_sys module changes the mode of the "io" debugfs file to 0600. This will cause any attempts to access it under a kernel in lockdown mode to return -EPERM, which makes the entire ec_sys module unusable. Use the special module_param_hw() macro for module parameters which may not be used while in lockdown mode, to avoid this. Signed-off-by: Hans de Goede Signed-off-by: Rafael J. Wysocki --- drivers/acpi/ec_sys.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c index fd39c14493ab..c074a0fae059 100644 --- a/drivers/acpi/ec_sys.c +++ b/drivers/acpi/ec_sys.c @@ -19,7 +19,7 @@ MODULE_DESCRIPTION("ACPI EC sysfs access driver"); MODULE_LICENSE("GPL"); static bool write_support; -module_param(write_support, bool, 0644); +module_param_hw(write_support, bool, other, 0644); MODULE_PARM_DESC(write_support, "Dangerous, reboot and removal of battery may " "be needed.");