Comment 6 for bug 773524

Appears to be the same issue we see with MMC cards on the X220.
mmcblk0: error -110 sending status command

IMHO this is caused because the MMC function of the Card reader chipset gets in the way of the SD interfaces in the driver, there is a way to disable the MMC function of the chipset so that we can use the SD interfaces in the kernel to read MMC/SD/SDHCI cards. We need to know the PCI config bits that needs to be written to the chipset. If the BIOS vendor can give us that information we should be able to get this working. Please refer to my email communications to the linux-input upstream mailing list for details.