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    SubjectRe: SDHCI regression since 2.6.39
    Date
    Hi Jeremy,

    On Tue, Sep 13 2011, Jeremy Fitzhardinge wrote:
    >> On Mon, Sep 12 2011, Jeremy Fitzhardinge wrote:
    >>> Since 2.6.39, the SD card slot in my Lenovo X220 has stopped working.
    >>> When I insert a card with current linux.git kernel (3.1-rc6), I get:
    >>>
    >>> [ 3891.745549] mmc0: new SDHC card at address b368
    >>> [ 3891.790704] mmcblk0: mmc0:b368 PNY 7.51 GiB
    >>> [ 3891.795568] mmc0: Got data interrupt 0x00200000 even though no data
    >>> operation was in progress.
    >>
    >> Please could you try reverting a3c7778f8153b9 "mmc: sdhci: R1B command
    >> handling + MMC_CAP_ERASE"? We've had one other similar report that
    >> bisected to this patch.
    >
    > The revert was not entirely trivial (below), but I'm fairly sure I got
    > it right, and it didn't help.

    Thanks very much for doing that, sorry it didn't help.

    There's another related patch for your controller:
    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/773524

    This was merged as 15bed0f2fa8e1d7db ("mmc: Added quirks for Ricoh
    1180:e823 lower base clock frequency"). Perhaps you could check that
    this code is running for you?

    If it is running, and not helping, can I persuade you to try a full
    bisection? I don't think we have other reports of this bug, and the
    only other person who has reported something like it wasn't a kernel
    hacker.

    Thanks!

    - Chris.
    --
    Chris Ball <cjb@laptop.org> <http://printf.net/>
    One Laptop Per Child


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