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    SubjectRe: [PATCH 00/11] Sort out sdio_uart - stage two
    On Tue, 3 Nov 2009, Alan Cox wrote:

    > With the bugs Nicolas reported hopefully now nailed.

    Progress, but still not there yet.

    I'm still using the same "cat /dev/ttySDIO0" test with a GPS card.

    Yanking the card out does terminate the cat process properly. Inserting
    the card back in and restarting cat always fails with:

    cat: /dev/ttySDIO0: Input/output error

    The same thing occurs if I terminate cat with ^C instead of pulling the
    card out.

    From what I can see, sdio_uart_open() and sdio_uart_activate() are
    called on the first cat invocation, and then sdio_uart_close() and
    sdio_uart_shutdown() when cat is stopped with ^C. However neither
    sdio_uart_open() nor sdio_uart_activate() is ever called anymore with
    any subsequent cat invocations until a reboot. Some upper layer must
    have taken upon itself to return -EIO to user space.


    Nicolas


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