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hp-wmi: limit hotkey enable

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Do not write initialize magic on systems that do not have
feature query 0xb. Fixes Bug #82451.

Redefine FEATURE_QUERY to align with 0xb and FEATURE2 with 0xd
for code clearity.

Add a new test function, hp_wmi_bios_2008_later() & simplify
hp_wmi_bios_2009_later(), which fixes a bug in cases where
an improper value is returned. Probably also fixes Bug #69131.

Add missing __init tag.

Signed-off-by: Kyle Evans <kvans32@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Kyle Evans 2015-09-11 10:40:17 -05:00 committed by Darren Hart
parent 53147b6cab
commit 8a1513b493
1 changed files with 20 additions and 11 deletions
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31
drivers/platform/x86/hp-wmi.c
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@ -54,8 +54,9 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
#define HPWMI_HARDWARE_QUERY 0x4
#define HPWMI_WIRELESS_QUERY 0x5
#define HPWMI_BIOS_QUERY 0x9
#define HPWMI_FEATURE_QUERY 0xb
#define HPWMI_HOTKEY_QUERY 0xc
#define HPWMI_FEATURE_QUERY 0xd
#define HPWMI_FEATURE2_QUERY 0xd
#define HPWMI_WIRELESS2_QUERY 0x1b
#define HPWMI_POSTCODEERROR_QUERY 0x2a
@ -295,25 +296,33 @@ static int hp_wmi_tablet_state(void)
return (state & 0x4) ? 1 : 0;
}
static int __init hp_wmi_bios_2009_later(void)
static int __init hp_wmi_bios_2008_later(void)
{
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
sizeof(state), sizeof(state));
if (ret)
return ret;
if (!ret)
return 1;
return (state & 0x10) ? 1 : 0;
return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
}
static int hp_wmi_enable_hotkeys(void)
static int __init hp_wmi_bios_2009_later(void)
{
int ret;
int query = 0x6e;
int state = 0;
int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
sizeof(state), sizeof(state));
if (!ret)
return 1;
ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
0);
return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
}
static int __init hp_wmi_enable_hotkeys(void)
{
int value = 0x6e;
int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
sizeof(value), 0);
if (ret)
return -EINVAL;
return 0;
@ -663,7 +672,7 @@ static int __init hp_wmi_input_setup(void)
hp_wmi_tablet_state());
input_sync(hp_wmi_input_dev);
if (hp_wmi_bios_2009_later() == 4)
if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
hp_wmi_enable_hotkeys();
status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);