[PATCH] platform/x86: asus-wmi: don't warn when LPS0 is unavailable

[Asai Neko]

asus-wmi attempts to register its LPS0 suspend-to-idle callback during
probe. acpi_register_lps0_dev() returns -ENODEV when the LPS0 interface
is unavailable or explicitly disabled, but the driver treats this
expected condition as a registration failure and prints:

  failed to register LPS0 sleep handler in asus-wmi

This occurs on the ASUS ROG STRIX X670E-A GAMING WIFI with BIOS 2704.
The system exposes no PNP0D80 ACPI device and uses deep suspend. The
warning therefore misleadingly suggests a sleep-related malfunction
on a platform where the LPS0 callback is not applicable.

Suppress the warning for -ENODEV while retaining it for other errors.
Leave callback registration and suspend/resume behavior unchanged.

Signed-off-by: Asai Neko <sugar@xxxxxxx>
---
Avoid the misleading ASUS WMI warning when LPS0 is unavailable.
The diagnosis and rationale are included in the patch commit
message.
---
 drivers/platform/x86/asus-wmi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index a65090429ca7..f7d009b742b3 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -5421,8 +5421,11 @@ static struct acpi_s2idle_dev_ops asus_ally_s2idle_dev_ops = {
 
 static void asus_s2idle_check_register(void)
 {
-	if (acpi_register_lps0_dev(&asus_ally_s2idle_dev_ops))
-		pr_warn("failed to register LPS0 sleep handler in asus-wmi\n");
+	int ret;
+
+	ret = acpi_register_lps0_dev(&asus_ally_s2idle_dev_ops);
+	if (ret && ret != -ENODEV)
+		pr_warn("failed to register LPS0 sleep handler in asus-wmi\n", ret);
 }
 
 static void asus_s2idle_check_unregister(void)

---
base-commit: 587858367581b9c55c3690f4e63382ad622719d4
change-id: 20260916-asus-wmi-lps0-unavailable-warn-9a72be44b9ed

Best regards,
--  
Asai Neko <sugar@xxxxxxx>


-- 
Asai Neko