pxa2xx: Avoid object_get_link_property() assertion for "parent_bus"

pxa2xx_i2c_init() creates a pxa2xx-i2c-slave device on a second i2c-bus,
which has a NULL parent device. This causes an assertion in
object_get_canonical_path() when accessing pxa2xx-i2c-slave's
"parent_bus" link<bus> property in tosa and likely other PXA2xx machines.

Fix this by using the pxa2xx_i2c device, created just before, as parent.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Message-id: 1375621501-5564-1-git-send-email-afaerber@suse.de
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/arm/pxa2xx.c

@@ -1479,6 +1479,7 @@ PXA2xxI2CState *pxa2xx_i2c_init(hwaddr base,
     DeviceState *dev;
     SysBusDevice *i2c_dev;
     PXA2xxI2CState *s;
+    i2c_bus *i2cbus;
 
     dev = qdev_create(NULL, TYPE_PXA2XX_I2C);
     qdev_prop_set_uint32(dev, "size", region_size + 1);
@@ -1491,7 +1492,8 @@ PXA2xxI2CState *pxa2xx_i2c_init(hwaddr base,
 
     s = PXA2XX_I2C(i2c_dev);
     /* FIXME: Should the slave device really be on a separate bus?  */
-    dev = i2c_create_slave(i2c_init_bus(NULL, "dummy"), "pxa2xx-i2c-slave", 0);
+    i2cbus = i2c_init_bus(dev, "dummy");
+    dev = i2c_create_slave(i2cbus, "pxa2xx-i2c-slave", 0);
     s->slave = FROM_I2C_SLAVE(PXA2xxI2CSlaveState, I2C_SLAVE(dev));
     s->slave->host = s;