static int sbefifo_check_sbe_state()

in fsi-sbefifo.c [281:319]

• 31 lines of code
• 13 McCabe index (conditional complexity)

static int sbefifo_check_sbe_state(struct sbefifo *sbefifo)
{
	__be32 raw_word;
	u32 sbm;
	int rc;

	rc = fsi_slave_read(sbefifo->fsi_dev->slave, CFAM_GP_MBOX_SBM_ADDR,
			    &raw_word, sizeof(raw_word));
	if (rc)
		return rc;
	sbm = be32_to_cpu(raw_word);

	/* SBE booted at all ? */
	if (!(sbm & CFAM_SBM_SBE_BOOTED))
		return -ESHUTDOWN;

	/* Check its state */
	switch ((sbm & CFAM_SBM_SBE_STATE_MASK) >> CFAM_SBM_SBE_STATE_SHIFT) {
	case SBE_STATE_UNKNOWN:
		return -ESHUTDOWN;
	case SBE_STATE_DMT:
		return -EBUSY;
	case SBE_STATE_IPLING:
	case SBE_STATE_ISTEP:
	case SBE_STATE_MPIPL:
	case SBE_STATE_RUNTIME:
	case SBE_STATE_DUMP: /* Not sure about that one */
		break;
	case SBE_STATE_FAILURE:
	case SBE_STATE_QUIESCE:
		return -ESHUTDOWN;
	}

	/* Is there async FFDC available ? Remember it */
	if (sbm & CFAM_SBM_SBE_ASYNC_FFDC)
		sbefifo->async_ffdc = true;

	return 0;
}