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

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