• Shawn Lin's avatar
    mmc: core: Adjust and reuse the macro of R1_STATUS(x) · a94a7483
    Shawn Lin authored
    R1_STATUS(x) now is only used by ioctl_rpmb_card_status_poll(),
    which checks all bits as possible. But according to the spec,
    bit 17 and bit 18 should be ignored, as well bit 14 which is
    reserved(must be set to 0) quoting from the spec and these rule
    apply to all places checking the device status. So change
    its checking from 0xFFFFE000 to 0xFFF9A000.
    
    As a bonus, we reuse it for mmc_do_erase() as well as
    mmc_switch_status_error().
    (1) Currently mmc_switch_status_error() doesn't check bit 25, but
    it means device is locked but not unlocked by CMD42 prior to any
    operations which need check busy, which is also not allowed.
    (2) mmc_do_erase() also forgot to to check bit 15, WP_ERASE_SKIP.
    The spec says "Only partial address space was erased due to existing
    write protected blocks.", which obviously means we should fail this I/O.
    Otherwise, the partial erased data stored in nonvalatile flash violates
    the data integrity from the view of I/O owner, which probably confuse
    it when further used.
    
    So reusing R1_STATUS for them not only improve the readability but also
    slove real problems.
    Signed-off-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
    Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
    a94a7483
mmc.h 16.7 KB