[PATCH] powerpc/papr_scm: Add PAPR command family to pass-through command-set

[Ira Weiny]

On Mon, Sep 28, 2020 at 06:44:52PM +0530, Vaibhav Jain wrote:
> Hi Dan, Ira and Vishal,
> 
> Can you please take a look at this patch. Without it the functionality
> to report nvdimm health via ndctl breaks on 5.9

Sorry...

> 
> Thanks,
> ~ Vaibhav
> 
> Vaibhav Jain <vaibhav at linux.ibm.com> writes:
> 
> > Add NVDIMM_FAMILY_PAPR to the list of valid 'dimm_family_mask'
> > acceptable by papr_scm. This is needed as since commit
> > 92fe2aa859f5 ("libnvdimm: Validate command family indices") libnvdimm
> > performs a validation of 'nd_cmd_pkg.nd_family' received as part of
> > ND_CMD_CALL processing to ensure only known command families can use
> > the general ND_CMD_CALL pass-through functionality.
> >
> > Without this change the ND_CMD_CALL pass-through targeting
> > NVDIMM_FAMILY_PAPR error out with -EINVAL.
> >
> > Fixes: 92fe2aa859f5 ("libnvdimm: Validate command family indices")
> > Signed-off-by: Vaibhav Jain <vaibhav at linux.ibm.com>

LGTM

Reviewed-by: Ira Weiny <ira.weiny at intel.com>

> > ---
> >  arch/powerpc/platforms/pseries/papr_scm.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
> > index 5493bc847bd08..27268370dee00 100644
> > --- a/arch/powerpc/platforms/pseries/papr_scm.c
> > +++ b/arch/powerpc/platforms/pseries/papr_scm.c
> > @@ -898,6 +898,9 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
> >  	p->bus_desc.of_node = p->pdev->dev.of_node;
> >  	p->bus_desc.provider_name = kstrdup(p->pdev->name, GFP_KERNEL);
> >  
> > +	/* Set the dimm command family mask to accept PDSMs */
> > +	set_bit(NVDIMM_FAMILY_PAPR, &p->bus_desc.dimm_family_mask);
> > +
> >  	if (!p->bus_desc.provider_name)
> >  		return -ENOMEM;
> >  
> > -- 
> > 2.26.2
> >