summaryrefslogtreecommitdiff
path: root/drivers/platform
diff options
context:
space:
mode:
authorLee, Chun-Yi <joeyli.kernel@gmail.com>2017-04-04 19:32:14 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-04-12 12:41:17 +0200
commit8d620dff40bab02f4da98c95e2fd47f445f5440a (patch)
tree132d029a2f197defaa89edcf9d8971a1cc05541c /drivers/platform
parent2bd6cc1cce47a4e572ba5f9107b34120cd8c3302 (diff)
platform/x86: acer-wmi: Only supports AMW0_GUID1 on acer family
[ Upstream commit 5241b1938a4d33eee3d3b43f23067c8e5b96db45 ] The AMW0_GUID1 wmi is not only found on Acer family but also other machines like Lenovo, Fujitsu and Medion. In the past, acer-wmi handled those non-Acer machines by quirks list. But actually acer-wmi driver was loaded on any machine that had AMW0_GUID1. This behavior is strange because those machines should be supported by appropriate wmi drivers. e.g. fujitsu-laptop, ideapad-laptop. This patch adds the logic to check the machine that has AMW0_GUID1 should be in Acer/Packard Bell/Gateway white list. But, it still keeps the quirk list of those supported non-acer machines for backward compatibility. Tested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Lee, Chun-Yi <jlee@suse.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/acer-wmi.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 79d64ea00bfb..a66192f692e3 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -355,6 +355,32 @@ static const struct dmi_system_id acer_blacklist[] __initconst = {
{}
};
+static const struct dmi_system_id amw0_whitelist[] __initconst = {
+ {
+ .ident = "Acer",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ },
+ },
+ {
+ .ident = "Gateway",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Gateway"),
+ },
+ },
+ {
+ .ident = "Packard Bell",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Packard Bell"),
+ },
+ },
+ {}
+};
+
+/*
+ * This quirk table is only for Acer/Gateway/Packard Bell family
+ * that those machines are supported by acer-wmi driver.
+ */
static const struct dmi_system_id acer_quirks[] __initconst = {
{
.callback = dmi_matched,
@@ -464,6 +490,17 @@ static const struct dmi_system_id acer_quirks[] __initconst = {
},
.driver_data = &quirk_acer_travelmate_2490,
},
+ {}
+};
+
+/*
+ * This quirk list is for those non-acer machines that have AMW0_GUID1
+ * but supported by acer-wmi in past days. Keeping this quirk list here
+ * is only for backward compatible. Please do not add new machine to
+ * here anymore. Those non-acer machines should be supported by
+ * appropriate wmi drivers.
+ */
+static const struct dmi_system_id non_acer_quirks[] __initconst = {
{
.callback = dmi_matched,
.ident = "Fujitsu Siemens Amilo Li 1718",
@@ -598,6 +635,7 @@ static void __init find_quirks(void)
{
if (!force_series) {
dmi_check_system(acer_quirks);
+ dmi_check_system(non_acer_quirks);
} else if (force_series == 2490) {
quirks = &quirk_acer_travelmate_2490;
}
@@ -2108,6 +2146,24 @@ static int __init acer_wmi_init(void)
find_quirks();
/*
+ * The AMW0_GUID1 wmi is not only found on Acer family but also other
+ * machines like Lenovo, Fujitsu and Medion. In the past days,
+ * acer-wmi driver handled those non-Acer machines by quirks list.
+ * But actually acer-wmi driver was loaded on any machines that have
+ * AMW0_GUID1. This behavior is strange because those machines should
+ * be supported by appropriate wmi drivers. e.g. fujitsu-laptop,
+ * ideapad-laptop. So, here checks the machine that has AMW0_GUID1
+ * should be in Acer/Gateway/Packard Bell white list, or it's already
+ * in the past quirk list.
+ */
+ if (wmi_has_guid(AMW0_GUID1) &&
+ !dmi_check_system(amw0_whitelist) &&
+ quirks == &quirk_unknown) {
+ pr_err("Unsupported machine has AMW0_GUID1, unable to load\n");
+ return -ENODEV;
+ }
+
+ /*
* Detect which ACPI-WMI interface we're using.
*/
if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))