3.8-stable review patch. If anyone has any objections, please let me know.
------------------ From: Balaji T K <[email protected]> commit d0123ccac55088811bde4f76c4a3fdbd39c3cfba upstream. SET_BLOCK_COUNT CMD23 is needed for all access to RPMB partition. If block count is not set by CMD23, all subsequent read/write commands fail as per eMMC specification. So, If the host does not support CMD23, do not expose RPMB partition. Accessing RPMB partition can cause hang / huge delay for hosts which do not support CMD23. Signed-off-by: Balaji T K <[email protected]> Reported-and-Tested-by: Peter Ujfalusi <[email protected]> Signed-off-by: Chris Ball <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/mmc/core/mmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -496,7 +496,7 @@ static int mmc_read_ext_csd(struct mmc_c * RPMB regions are defined in multiples of 128K. */ card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; - if (ext_csd[EXT_CSD_RPMB_MULT]) { + if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, EXT_CSD_PART_CONFIG_ACC_RPMB, "rpmb", 0, false, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
