Hi,
These patches are to enable the runtime PM support for mmc storage cards.
Currently, there's already runtime PM support in the mmc core layer. But
for the mmc storage card (SD card, mmc card, eMMC device and so on) to
work with runtime PM, it also needs both block driver and host controller
driver to implement the runtime PM support, which are not presented in
current kernel.
These patches implemented the runtime PM for both block driver and PCI
interface SDHCI host controller driver. It also tried to fix some issues
of current runtime PM implementation of mmc core layer.
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