From a74dd5fdabcd34c93e17e9c7024eeb503c92b048 Mon Sep 17 00:00:00 2001
From: Carlos Corbacho <carlos@strangeworlds.co.uk>
Date: Sat, 4 Apr 2009 09:33:29 +0100
Subject: [PATCH] acer-wmi: Blacklist Acer Aspire One
The Aspire One's ACPI-WMI interface is a placeholder that does nothing,
and the invalid results that we get from it are now causing userspace
problems as acer-wmi always returns that the rfkill is enabled (i.e. the
radio is off, when it isn't). As it's hardware controlled, acer-wmi
isn't needed on the Aspire One either.
Thanks to Andy Whitcroft at Canonical for tracking down Ubuntu's userspace
issues to this.
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Reported-by: Andy Whitcroft <apw@canonical.com>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/platform/x86/acer-wmi.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index a6a42e8c060b..60fbef283e73 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -225,6 +225,25 @@ static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
.wireless = 2,
};
+/* The Aspire One has a dummy ACPI-WMI interface - disable it */
+static struct dmi_system_id __devinitdata acer_blacklist[] = {
+ {
+ .ident = "Acer Aspire One (SSD)",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
+ },
+ },
+ {
+ .ident = "Acer Aspire One (HDD)",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
+ },
+ },
+ {}
+};
+
static struct dmi_system_id acer_quirks[] = {
{
.callback = dmi_matched,
@@ -1254,6 +1273,12 @@ static int __init acer_wmi_init(void)
printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
+ if (dmi_check_system(acer_blacklist)) {
+ printk(ACER_INFO "Blacklisted hardware detected - "
+ "not loading\n");
+ return -ENODEV;
+ }
+
find_quirks();
/*
--
2.34.1