Hi Andy, > > I found the issue when testing DMA with the UART transferring different > amounts of data. > > Can you tell more about the setup and test cases? We had a loopback test from one uart to another. The test checks the following transfer lengths (bytes): 1 to 33, 2043 to 2053, 4091 to 4101, 8187 to 8297, 16379 to 16389 I think 1 to 33 and 4095 to 4097 were enough to find the problem. > Also, which version of the DW DMAC IP is being used in this SoC? I'm still checking, but it looks to be 2.18b Thanks Phil