[PATCH v3 25/27] powerpc/powernv/pmem: Expose the serial number in sysfs

[Alastair D'Silva]

On Mon, 2020-03-02 at 10:42 +1100, Alastair D'Silva wrote:
> On Fri, 2020-02-28 at 08:15 +0100, Greg Kroah-Hartman wrote:
> > On Fri, Feb 28, 2020 at 05:25:31PM +1100, Andrew Donnellan wrote:
> > > On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> > > > +int ocxlpmem_sysfs_add(struct ocxlpmem *ocxlpmem)
> > > > +{
> > > > +	int i, rc;
> > > > +
> > > > +	for (i = 0; i < ARRAY_SIZE(attrs); i++) {
> > > > +		rc = device_create_file(&ocxlpmem->dev,
> > > > &attrs[i]);
> > > > +		if (rc) {
> > > > +			for (; --i >= 0;)
> > > > +				device_remove_file(&ocxlpmem-
> > > > >dev,
> > > > &attrs[i]);
> > > 
> > > I'd rather avoid weird for loop constructs if possible.
> > > 
> > > Is it actually dangerous to call device_remove_file() on an attr
> > > that hasn't
> > > been added? If not then I'd rather define an err: label and loop
> > > over the
> > > whole array there.
> > 
> > None of this should be used at all, just use attribute groups
> > properly
> > and the driver core will handle this all for you.
> > 
> > device_create/remove_file should never be called by anyone anymore
> > if
> > at all
> > possible.
> > 
> > thanks,
> > 
> > greg k-h
> 
> Thanks, I'll rework it to use the .groups member of struct
> pci_driver.
> 

I ended up making these available as DIMM attributes instead.

-- 
Alastair D'Silva
Open Source Developer
Linux Technology Centre, IBM Australia
mob: 0423 762 819