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* [PATCH] acer-wmi: check wireless capability on AMW0_GUID2 machines
@ 2012-01-09  6:31 Lee, Chun-Yi
  2012-01-09  8:01 ` Carlos Corbacho
  0 siblings, 1 reply; 28+ messages in thread
From: Lee, Chun-Yi @ 2012-01-09  6:31 UTC (permalink / raw)
  To: mjg
  Cc: platform-driver-x86, Lee, Chun-Yi, Carlos Corbacho,
	Dmitry Torokhov, Corentin Chary, Thomas Renninger

From: "Lee, Chun-Yi" <jlee@suse.com>

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@gmail.com>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
---
 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

^ permalink raw reply related	[flat|nested] 28+ messages in thread
end of thread, other threads:[~2012-03-19 14:48 UTC | newest]

Thread overview: 28+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-01-09  6:31 [PATCH] acer-wmi: check wireless capability on AMW0_GUID2 machines Lee, Chun-Yi
2012-01-09  8:01 ` Carlos Corbacho
2012-01-09 10:00   ` joeyli
2012-01-09 22:15     ` Carlos Corbacho
2012-01-11  4:26       ` joeyli
2012-01-11 16:54         ` Ike Panhc
2012-01-12  0:21           ` joeyli
2012-01-25  1:18             ` Ike Panhc
2012-01-20  2:44           ` joeyli
2012-01-25  1:29             ` Ike Panhc
2012-01-25  1:57             ` [PATCH] acer-wmi: No wifi rfkill on Lenovo machines Ike Panhc
2012-01-25  2:14               ` Ike Panhc
2012-01-26  2:53                 ` joeyli
2012-02-03  8:46                   ` [PATCH v2] " Ike Panhc
2012-02-03  8:55                     ` Ike Panhc
2012-02-06  9:55                     ` joeyli
2012-02-11 19:10                     ` Jonathan Nieder
2012-02-21  9:22                       ` [PATCH resend] " Jonathan Nieder
2012-03-14 21:53                     ` [PATCH 3.0.y] " Jonathan Nieder
2012-03-14 22:02                       ` Greg KH
2012-03-14 22:17                         ` Jonathan Nieder
2012-03-16  4:03                           ` Ike Panhc
2012-03-16  6:11                             ` joeyli
2012-03-16 17:20                               ` Greg KH
2012-03-19  2:08                                 ` joeyli
2012-03-19 12:40                                   ` Andrey
2012-03-19 14:48                                     ` Jonathan Nieder
2012-01-24  0:04           ` [PATCH] acer-wmi: check wireless capability on AMW0_GUID2 machines joeyli

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