Return the driver-specific state of dev. The softc is automatically allocated and zeroed the first time it is requested. The size of the allocation is determined by the devices
.Vt driver_t information used to define the driver. The softc typically encapsulates the state of this instance of the device.
Driver writers are discouraged from using their own softc management mechanisms. Driver writers should not copy such mechanisms found in drivers in the tree that predates this function.
The pointer to the driver-specific instance variable is returned.
device(9), device_set_softc(9), driver(9)