On 4 May 2016 at 13:38, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote: > Hi > > The RPMB partition only allows certain commands. In particular, > the tuning command (CMD21) is not allowed - refer JEDEC eMMC > standard v5.1 section 6.2.2 Command restrictions. > > That means commands will begin failing if re-tuning is needed > while switched to the RPMB partition. > > As we discussed here: > > http://marc.info/?l=linux-mmc&m=146218765801869 > > this patch set takes a new approach which is: > > Re-tune before switching to the RPMB partition > Don't allow re-tuning while switched to RPMB > Switch back from the RPMB partition immediately > > I gave it a brief test with a HS400 eMMC and using mmc utils > to access RPMB. Despite all the partition switches and > re-tuning in between, all RPMB operations were successful. > > > Changes in V2: > > New approach entirely > > > Adrian Hunter (3): > mmc: core: Add a facility to "pause" re-tuning > mmc: block: Always switch back to main area after RPMB access > mmc: block: Pause re-tuning while switched to the RPMB partition > > drivers/mmc/card/block.c | 19 ++++++++++++++++++- > drivers/mmc/core/host.c | 22 ++++++++++++++++++++++ > include/linux/mmc/host.h | 4 ++++ > 3 files changed, 44 insertions(+), 1 deletion(-) > > > Regards > Adrian Thanks, applied for next! Kind regards Uffe -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
