dm6467达芬奇平台usb问题？

ruixing103

困惑几天了，一直没弄明白，我在开发板上，加了一路VGA信号采用和编码，同时对usb移动硬盘一个线程读，一个线程写。开发几分钟usb正常，当读写不到3分钟时，usb无故断开
串口打印信息 ，不加VGA采用，usb读写没有问题。测试很多次了，问题就是出现在读线程上面，就是不知道上面原因导致的，怎么解决。
<3>musb_ep_program 957: broken !rx_reinit, ep1 csr 0003
usb 1-1: reset high speed USB device using musb_hdrc and address 2
musb_host_rx 1557: RX1 dma busy, csr 2020
usb 1-1: reset high speed USB device using musb_hdrc and address 2
usb 1-1: reset high speed USB device using musb_hdrc and address 2
usb 1-1: reset high speed USB device using musb_hdrc and address 2
usb 1-1: reset high speed USB device using musb_hdrc and address 2
sd 0:0:0:0: scsi: Device offlined - not ready after error recovery
sd 0:0:0:0: SCSI error: return code = 0x00050000
end_request: I/O error, dev sda, sector 93336
sd 0:0:0:0: rejecting I/O to offline device
sd 0:0:0:0: SCSI error: return code = 0x00010000
end_request: I/O error, dev sda, sector 93576
sd 0:0:0:0: rejecting I/O to offline device
sd 0:0:0:0: rejecting I/O to offline device
sd 0:0:0:0: rejecting I/O to offline device
sd 0:0:0:0: rejecting I/O to offline device