Re: [PATCH 4/5] mmc: core: Add support for graceful host removal for eMMC

[Wolfram Sang]

> > > +     _mmc_suspend(host, MMC_POWEROFF_UNBIND);
> > Couldn't find how _mmc_suspend handles this new power off flag?
> 
> Right. You need to look closer at mmc_may_poweroff_notify() as it
> should return false if MMC_POWEROFF_UNBIND, unless
> MMC_CAP2_FULL_PWR_CYCLE.

And this is what we need for Renesas SDHI which only has
MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND. What this means is:
For suspend, we have some blackbox firmware (PSCI) handling the power
cycle. But for unbind, we cannot trigger the firmware, so we can't use
the notification but need mmc_sleep().

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