thermal: int3403_thermal: Fix NULL pointer deref on module load / probe

[ Upstream commit 13b86f50eaaddaea4bdd2fe476fd12e6a0951add ]

Starting with kernel 4.17 thermal_cooling_device_register() will call the
get_max_state() op during register.

Since we deref priv->priv in int3403_get_max_state() this means we must
set priv->priv before calling thermal_cooling_device_register().

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/thermal/int340x_thermal/int3403_thermal.c b/drivers/thermal/int340x_thermal/int3403_thermal.c
index 8a7f24d..0c19fcd 100644 (file)
--- a/drivers/thermal/int340x_thermal/int3403_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3403_thermal.c
@@ -194,6 +194,7 @@ static int int3403_cdev_add(struct int3403_priv *priv)
                return -EFAULT;
        }
 
+       priv->priv = obj;
        obj->max_state = p->package.count - 1;
        obj->cdev =
                thermal_cooling_device_register(acpi_device_bid(priv->adev),
@@ -201,8 +202,6 @@ static int int3403_cdev_add(struct int3403_priv *priv)
        if (IS_ERR(obj->cdev))
                result = PTR_ERR(obj->cdev);
 
-       priv->priv = obj;
-
        kfree(buf.pointer);
        /* TODO: add ACPI notification support */