|SPI_BUS_UNLOCK(9)||Serial Peripheral Interface (S||SPI_BUS_UNLOCK(9)|
spi_bus_unlock - release the lock for exclusive SPI bus usage
int spi_bus_unlock(struct spi_master * master);
This call may only be used from a context that may sleep. The sleep is non-interruptible, and has no timeout.
This call releases an SPI bus lock previously obtained by an spi_bus_lock call.
|January 2017||Kernel Hackers Manual 4.8.|