AHD_SCB_MAX_ALLOC
if (max_list_size > (AHD_SCB_MAX_ALLOC * sg_list_increment))
max_list_size = (AHD_SCB_MAX_ALLOC * sg_list_increment);
if (scb_data->numscbs >= AHD_SCB_MAX_ALLOC)
newcount = min(newcount, (AHD_SCB_MAX_ALLOC - scb_data->numscbs));