hwmon: (hp-wmi-sensors) Check if WMI event data exists

[ Upstream commit a54da9df75cd1b4b5028f6c60f9a211532680585 ]

The BIOS can choose to return no event data in response to a
WMI event, so the ACPI object passed to the WMI notify handler
can be NULL.

Check for such a situation and ignore the event in such a case.

Fixes: 23902f98f8d4 ("hwmon: add HP WMI Sensors driver")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Message-ID: <20240901031055.3030-2-W_Armin@gmx.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hwmon/hp-wmi-sensors.c b/drivers/hwmon/hp-wmi-sensors.c
index b5325d0e72b9cd7e728b80c71a156e1d268a3b89..dfa1d6926deacc86e4db68167e086ede0ea2c00f 100644 (file)
--- a/drivers/hwmon/hp-wmi-sensors.c
+++ b/drivers/hwmon/hp-wmi-sensors.c
@@ -1637,6 +1637,8 @@ static void hp_wmi_notify(u32 value, void *context)
                goto out_unlock;
 
        wobj = out.pointer;
+       if (!wobj)
+               goto out_unlock;
 
        err = populate_event_from_wobj(dev, &event, wobj);
        if (err) {