I am working on a TWRK70F120M board with MQX 4.0.1. My device is switching between different modes where core frequency is switching between 24Mhz and 120Mhz(For reducing current conception). Also I have one spi driven LCD in my hardware and SPI2 is used for that. When I am switching the core frequency i am also changing the spi buad rate using ioctl command. But my issue is that that task hangs after that . Please let me know your valuable thoughts.