An I²C adapter might be instantiated without parent. In such case
there is no property can be retrieved. Skip SMBus alert setup when
this happens.
Fixes:
a263a84088f6 ("i2c: smbus: Use device_*() functions instead of of_*()")
Reported-by: syzbot+0591ccf54ee05344e4eb@syzkaller.appspotmail.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
#if IS_ENABLED(CONFIG_I2C_SMBUS)
int i2c_setup_smbus_alert(struct i2c_adapter *adapter)
{
+ struct device *parent = adapter->dev.parent;
int irq;
- irq = device_property_match_string(adapter->dev.parent, "interrupt-names",
- "smbus_alert");
+ /* Adapter instantiated without parent, skip the SMBus alert setup */
+ if (!parent)
+ return 0;
+
+ irq = device_property_match_string(parent, "interrupt-names", "smbus_alert");
if (irq == -EINVAL || irq == -ENODATA)
return 0;
else if (irq < 0)