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
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