From: Chuanhong Guo Date: Tue, 12 Jul 2022 02:00:58 +0000 (+0800) Subject: ACPI: resource: skip IRQ override on AMD Zen platforms X-Git-Tag: v6.0-rc1~185^2~1^5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9946e39fe8d0a5da9eb947d8e40a7ef204ba016e;p=thirdparty%2Fkernel%2Flinux.git ACPI: resource: skip IRQ override on AMD Zen platforms IRQ override isn't needed on modern AMD Zen systems. There's an active low keyboard IRQ on AMD Ryzen 6000 and it will stay this way on newer platforms. This IRQ override breaks keyboards for almost all Ryzen 6000 laptops currently on the market. Skip this IRQ override for all AMD Zen platforms because this IRQ override is supposed to be a workaround for buggy ACPI DSDT and we can't have a long list of all future AMD CPUs/Laptops in the kernel code. If a device with buggy ACPI DSDT shows up, a separated list containing just them should be created. Link: https://bugzilla.kernel.org/show_bug.cgi?id=216118 Suggested-by: Mario Limonciello Signed-off-by: Chuanhong Guo Acked-by: Mario Limonciello Tested-by: XiaoYan Li Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index c2d4947844250..510cdec375c4d 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -416,6 +416,16 @@ static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, { int i; +#ifdef CONFIG_X86 + /* + * IRQ override isn't needed on modern AMD Zen systems and + * this override breaks active low IRQs on AMD Ryzen 6000 and + * newer systems. Skip it. + */ + if (boot_cpu_has(X86_FEATURE_ZEN)) + return false; +#endif + for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) { const struct irq_override_cmp *entry = &skip_override_table[i];