Comment 3 for bug 193177

This is a known issue just like removable USB disk.

Actually SD/MMC driver has provided a solution. There is a "dangerous" kernel option CONFIG_MMC_UNSAFE_RESUME to fix this issue. It depends the customers to chose whether to enable this option.

I attached the option's description here:

config MMC_UNSAFE_RESUME
        bool "Allow unsafe resume (DANGEROUS)"
        help
          If you say Y here, the MMC layer will assume that all cards
          stayed in their respective slots during the suspend. The
          normal behaviour is to remove them at suspend and
          redetecting them at resume. Breaking this assumption will
          in most cases result in data corruption.

          This option is usually just for embedded systems which use
          a MMC/SD card for rootfs. Most people should say N here.