usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_submit_read_urb - usb_submit_urb failed: -19

usb_ch9344 1-2:1.0: ch9344_cmd_irq - usb_submit_urb failed: -19

usb 1-2: USB disconnect, device number 2

usb_ch9344 1-2:1.0: ch9344 usb device disconnect.

usb 1-2: new high-speed USB device number 3 using nuc980-ehci

usb_ch9344 1-2:1.0: ttyCH9344USB from 8 - 15: ch9344 device attached.

在armlinux环境下使用ch348接收7路串口数据，串口波特率为112500，接收一段时间后出现错误如上。

您好，如上提示信息为USB设备断连，对应系统日志为：“usb disconnect”，USB通道和串口通道并无直接关系，先看下上报disconnect后，设备是否可以自动重新枚举并生成串口，若是，则原因可能为通讯过程中给芯片供电的3V3电源不稳定导致。