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    SubjectRe: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang
    > The log shows no call to usb_serial_generic_write_room()
    > Do you consider this a bug in the tty layer?

    Actually this all makes sense because of where it was hanging. A reply of
    0 to the tty->ops->write will cause it to either return (O_NONBLOCK) or
    sleep in the n_tty write code waiting for a write_wait wakeup
    (tty_wakeup(tty))

    So the fix does indeed look correct.


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