Should busy() return true if dma3 not complete? (Teensy 4)

[ssilverman]

OctoWS2811/OctoWS2811_imxrt.cpp

Line 366 in 0e6d262

if (!dma3.complete()) ; // DMA still running

Is it intended that busy() return true if dma3 isn't complete? The if statement appears to do nothing otherwise. (Unless the act of reading TCD->CSR does some side-effect?)