linux-kernel - [PATCH 3.10 160/180] hp-wmi: Fix wifi cannot be hard-unblocked

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Date:   Sun, 21 Aug 2016 17:31:30 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Hung <alex.hung@...onical.com>,
        Darren Hart <dvhart@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 160/180] hp-wmi: Fix wifi cannot be hard-unblocked

From: Alex Hung <alex.hung@...onical.com>

commit fc8a601e1175ae351f662506030f9939cb7fdbfe upstream.

Several users reported wifi cannot be unblocked as discussed in [1].
This patch removes the use of the 2009 flag by BIOS but uses the actual
WMI function calls - it will be skipped if WMI reports unsupported.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=69131

Signed-off-by: Alex Hung <alex.hung@...onical.com>
Tested-by: Evgenii Shatokhin <eugene.shatokhin@...dex.ru>
Signed-off-by: Darren Hart <dvhart@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/platform/x86/hp-wmi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index d111c86..46497c6 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -640,6 +640,11 @@ static int hp_wmi_rfkill_setup(struct platform_device *device)
 	if (err)
 		return err;
 
+	err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &wireless,
+				   sizeof(wireless), 0);
+	if (err)
+		return err;
+
 	if (wireless & 0x1) {
 		wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 					   RFKILL_TYPE_WLAN,
-- 
2.8.0.rc2.1.gbe9624a