Handshake IRQ missed

Reading the handshake registers will delete the interrupt request for the handshake registers. But also writing a 1 to the handshake state register DPM_HOST_INT_STAT0 will delete a pending handshake interrupt request. Writing to the handshake state register is done after reading all handshake registers to clear any pending IRQs. It is possible that a handshake IRQ is issued right after reading the hanshake registers and the following write to the state register can delete such a new, not processed handshake interrupt.

Solution:
Masking all handshake IRQ flags before writing to the handshake state register.