I performed a stress test with several FT4232H chips connected to a hub, that is attached to one of the musb ports. So far the test was successful for several hours. But I've seen following warnings: musb_host_rx 1973: Rx interrupt with no errors or packet! musb_ep_program 931: broken !rx_reinit, ep5 csr 0203 musb_host_rx 1973: Rx interrupt with no errors or packet! musb_host_rx 1973: Rx interrupt with no errors or packet! musb_host_rx 1973: Rx interrupt with no errors or packet! musb_host_rx 1973: Rx interrupt with no errors or packet! musb_ep_program 931: broken !rx_reinit, ep5 csr 0003 musb_host_rx 1973: Rx interrupt with no errors or packet! musb_ep_program 931: broken !rx_reinit, ep7 csr 0003 Is this expected behavior? The test opens serial interfaces sends data, changes baudrate, closes port and so on. Yegor -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html