• K
    mmc: block: fix a bug of error handling in MMC driver · c8760069
    KOBAYASHI Yoshitake 提交于
    Current MMC driver doesn't handle generic error (bit19 of device
    status) in write sequence. As a result, write data gets lost when
    generic error occurs. For example, a generic error when updating a
    filesystem management information causes a loss of write data and
    corrupts the filesystem. In the worst case, the system will never
    boot.
    
    This patch includes the following functionality:
      1. To enable error checking for the response of CMD12 and CMD13
         in write command sequence
      2. To retry write sequence when a generic error occurs
    
    Messages are added for v2 to show what occurs.
    Signed-off-by: NKOBAYASHI Yoshitake <yoshitake.kobayashi@toshiba.co.jp>
    Signed-off-by: NChris Ball <cjb@laptop.org>
    c8760069
block.c 63.2 KB