Comment 9 for bug 323159

Still have the same problem in 9.10 , the 2.6.31-11 kernel

$ dmesg | grep mmc
[ 1.898328] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[ 10.335565] mmc0: Unknown controller version (2). You may experience problems.
[ 10.335808] Registered led device: mmc0::
[ 10.335899] mmc0: SDHCI controller on PCI [0000:08:06.2] using DMA

$ lspci -nn | grep MMC
08:06.2 SD Host controller [0805]: O2 Micro, Inc. Integrated MMC/SD Controller [1217:7120] (rev 02)