On Tue, Sep 05, 2017 at 04:51:51PM -0600, Jon Derrick wrote: Jens, sorry to bother, can you take this? Or do you have any follow up comments? RHEL Is starting to pull changes in for 7.5 I want to get this landed so they can pick it up. If it's already on your list, sorry for being impatient. > Looks good > > Acked-by Jon Derrick: <jonathan.derrick@xxxxxxxxx> > > > On 09/01/2017 08:53 AM, Scott Bauer wrote: > > Users who are booting off their Opal enabled drives are having > > issues when they have a shadow MBR set up after s3/resume cycle. > > When the Drive has a shadow MBR setup the MBRDone flag is set to > > false upon power loss (S3/S4/S5). When the MBRDone flag is false > > I/O to LBA 0 -> LBA_END_MBR are remapped to the shadow mbr > > of the drive. If the drive contains useful data in the 0 -> end_mbr > > range upon s3 resume the user can never get to that data as the > > drive will keep remapping it to the MBR. To fix this when we unlock > > on S3 resume, we need to tell the drive that we're done with the > > shadow mbr (even though we didnt use it) by setting true to MBRDone. > > This way the drive will stop the remapping and the user can access > > their data. > >
