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    SubjectRe: Bugs in MMC [was: [Bug 10030] Suspend doesn't work when SD card is inserted]
    On Monday 03 March 2008, Pierre Ossman wrote:
    > On Mon, 3 Mar 2008 13:59:37 -0800
    > David Brownell <> wrote:
    > >
    > > Card insert/remove events can be system wake events though. Which
    > > makes that restriction impractical.

    This part seems to be ignored by your comment ... wake events.

    > > I think hosts need to be able to call mmc_detect_change() as soon as
    > > they see a stable signal. The MMC core can hold off handling that
    > > for a while, if it needs to wait until the code walking the device
    > > tree gets around to resuming that host. It's a lot more natural to
    > > hold off such stuff one time there than in N host drivers; especially
    > > since the MMC core already has such hold-off code.
    > >
    > That actually sorts itself out as the MMC core reprobes on wakeup, but
    > I see your point. Right now things will work peachy if the controllers
    > just make sure to disable their card detection logic before telling the
    > core to suspend.

    That is, the MMC core doesn't understand wakeup events.

    Or, as pointed out elsewhere, well-behaved MMC hosts ... which don't
    need either such reprobing or the associated remove-on-suspend.

    - Dave

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