Why I got kernel message "RxData DMA copy to tty layer failed"?

Hi,

Please let me know why I got this failure message.
attached a 115200 bps device at ttyTHS3 (3130000).
used python Serial library

serial.Serial("/dev/ttyTHS3", baudrate=115200, timeout=10)

kernel log
[16140.379263] serial-tegra 3130000.serial: RxData DMA copy to tty layer failed
[16140.883276] serial-tegra 3130000.serial: RxData DMA copy to tty layer failed
[16141.390121] serial-tegra 3130000.serial: RxData DMA copy to tty layer failed
[16141.899244] serial-tegra 3130000.serial: RxData DMA copy to tty layer failed
[16146.336839] serial-tegra 3130000.serial: RxData PIO to tty layer failed
[16146.845397] serial-tegra 3130000.serial: RxData DMA copy to tty layer failed

Thanks in advance

hello chjung90,

may I know more details about what’s the modification you had done to configure to uart-d.
you may also refer to similar discussion thread, Topic 1056970 for setting up serial communication.
thanks