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pinctrl: Don't allow PINCTRL_AMD to be a module

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It was observed that by allowing pinctrl_amd to be loaded
later in the boot process that interrupts sent to the GPIO
controller early in the boot are not serviced.  The kernel treats
these as a spurious IRQ and disables the IRQ.

This problem was exacerbated because it happened on a system with
an encrypted partition so the kernel object was not accesssible for
an extended period of time while waiting for a passphrase.

To avoid this situation from occurring, stop allowing pinctrl-amd
from being built as a module and instead require it to be built-in
or disabled.

Reported-by: madcatx@atlas.cz
Suggested-by: jwrdegoede@fedoraproject.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216230
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220713175950.964-1-mario.limonciello@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Mario Limonciello 2022-07-13 12:59:50 -05:00 committed by Linus Walleij
parent ba9c4745fc
commit 41ef3c1a6b
1 changed files with 1 additions and 1 deletions
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2
drivers/pinctrl/Kconfig
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@ -32,7 +32,7 @@ config DEBUG_PINCTRL
Say Y here to add some extra checks and diagnostics to PINCTRL calls.
config PINCTRL_AMD
tristate "AMD GPIO pin control"
bool "AMD GPIO pin control"
depends on HAS_IOMEM
depends on ACPI || COMPILE_TEST
select GPIOLIB