From: "Lee, Chun-Yi" <jlee@xxxxxxxx>
Have many non-acer machines have AMW0_GUID2 method in DSDT, in
original acer-wmi design, driver direct set ACER_CAP_WIRELESS flag
for those machines but didn't check the functionality for set/get
wireless state.
It causes acer-wmi driver create a broken wireless rfkill and it
already set to soft blocked.
So, this patch add a wireless capability check before we set
ACER_CAP_WIRELESS flag to the machines that were included AMW0_GUID2.
It avoid acer-wmi create a broken wireless rfkill.
Thank's for Matthew Garrett give the idea.
Reference: brc#674353
https://bugzilla.redhat.com/show_bug.cgi?id=674353
Tested on Lenovo E520.
Tested on Acer TravelMate 4750.
Tested-by: mr.kobzar <mr.kobzar@xxxxxxxxx>
Cc: Carlos Corbacho <carlos@xxxxxxxxxxxxxxxxxxx>
Cc: Matthew Garrett <mjg@xxxxxxxxxx>
Cc: Dmitry Torokhov <dtor@xxxxxxx>
Cc: Corentin Chary <corentincj@xxxxxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
---
drivers/platform/x86/acer-wmi.c | 33 ++++++++++++++++++++++++++++++++-
1 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 88dfecf..5dfa46a 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -678,6 +678,37 @@ static acpi_status AMW0_find_mailled(void)
return AE_OK;
}
+static void AMW0_GUID2_set_capabilities(void)
+{
+ acpi_status status;
+ u32 original_state, new_state;
+
+ /* set wireless capability when detected has quirk */
+ if (quirks->wireless > 0) {
+ interface->capability |= ACER_CAP_WIRELESS;
+ return;
+ }
+
+ status = AMW0_get_u32(&original_state, ACER_CAP_WIRELESS);
+ if (ACPI_FAILURE(status))
+ return;
+
+ status = AMW0_set_u32(!original_state, ACER_CAP_WIRELESS);
+ if (ACPI_FAILURE(status))
+ return;
+
+ status = AMW0_get_u32(&new_state, ACER_CAP_WIRELESS);
+ if (ACPI_FAILURE(status))
+ return;
+
+ status = AMW0_set_u32(original_state, ACER_CAP_WIRELESS);
+ if (ACPI_FAILURE(status))
+ return;
+
+ if (new_state != original_state)
+ interface->capability |= ACER_CAP_WIRELESS;
+}
+
static acpi_status AMW0_set_capabilities(void)
{
struct wmab_args args;
@@ -691,7 +722,7 @@ static acpi_status AMW0_set_capabilities(void)
* work.
*/
if (wmi_has_guid(AMW0_GUID2)) {
- interface->capability |= ACER_CAP_WIRELESS;
+ AMW0_GUID2_set_capabilities();
return AE_OK;
}
--
1.7.7
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