RE: [RFC PATCH v1 1/2] ufs: core: Advanced RPMB detection

[Avri Altman <Avri.Altman@wdc.com>]

> Avri,
> 
> thanks for your review.
> 
> On Tue, 2022-11-08 at 13:40 +0000, Avri Altman wrote:
> > > From: Bean Huo <beanhuo@micron.com>
> > >
> > > Check UFS Advanced RPMB LU enablement during ufshcd_lu_init().
> > >
> > > Signed-off-by: Bean Huo <beanhuo@micron.com>
> > > ---
> > >  drivers/ufs/core/ufshcd.c | 4 ++++
> > >  include/ufs/ufs.h         | 3 +++
> > >  2 files changed, 7 insertions(+)
> > >
> > > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> > > index ee73d7036133..d49e7a0b82ca 100644
> > > --- a/drivers/ufs/core/ufshcd.c
> > > +++ b/drivers/ufs/core/ufshcd.c
> > > @@ -4940,6 +4940,10 @@ static void ufshcd_lu_init(struct ufs_hba
> > > *hba, struct scsi_device *sdev)
> > >             desc_buf[UNIT_DESC_PARAM_LU_WR_PROTECT] ==
> > > UFS_LU_POWER_ON_WP)
> > >                 hba->dev_info.is_lu_power_on_wp = true;
> > >
> > > +       if (desc_buf[UNIT_DESC_PARAM_UNIT_INDEX] == UFS_RPMB_UNIT
> > > &&
> > Please remind me why do we need both UFS_RPMB_UNIT and
> > UFS_UPIU_RPMB_WLUN ?
> 
> I see. they are the same value, we should remove one, will change it in next
> version.
> >
> > > +           desc_buf[UNIT_DESC_PARAM_RPMB_REGION_EN] & 1 << 4)
> > (1 << 4) or BIT(4) ?
Not saying that testing bit 4 of bRPMBRegionEnable is wrong,
Have you considered using bit 10 of dExtendedUFSFeaturesSupport and decided otherwise?

Thanks,
Avri