SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE
if ((channel_status & SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE) == 0) {
hdr.channel_status &= ~SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE;
channel_status |= SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE;
SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE));