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ACPI: EC: Mark the ec_sys write_support param as module_param_hw()

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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 <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Hans de Goede 2021-11-25 11:36:16 +01:00 committed by Rafael J. Wysocki
parent befd9b5b0c
commit b66f868494
1 changed files with 1 additions and 1 deletions
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2
drivers/acpi/ec_sys.c
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@ -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.");