> -----Original Message----- > From: Hunter, Adrian > Sent: Wednesday, May 04, 2016 14:38 > To: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > Cc: linux-mmc <linux-mmc@xxxxxxxxxxxxxxx>; Winkler, Tomas > <tomas.winkler@xxxxxxxxx> > Subject: [PATCH V2 0/3] mmc: block: Fix tuning (by avoiding it) for RPMB > > 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(-) > The series looks good, it will be easy to adjust to my RPMB patch. Thanks Tomas -- 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
