Hi, all..

Here is description for MMC block devices in Documentation/devices.txt :

    179 block       MMC block devices
                      0 = /dev/mmcblk0      First SD/MMC card
                      1 = /dev/mmcblk0p1    First partition on first MMC card
                      8 = /dev/mmcblk1      Second SD/MMC card
                      ^^^^^^^^^^^^^^^^^^
                    The start of next SD/MMC card can be configured with
                    CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
                    time using the mmcblk.perdev_minors option. That would
                    bump the offset between each card to be the configured
                    value instead of the default 8.


Shouldn't  "8 = /dev/mmcblk1" be "9 = /dev/mmcblk1" ?

If we have 8 partitions on first MMC card, we need mmcblk0p1 ~ mmcblk0p8 
devices, with minor number 1 ~ 8.
Am I misunderstanding?

Regards,
Jongman Heo.

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