On Thu, Jul 14, 2016 at 09:21:45PM -0600, Jason Gunthorpe wrote: > On Thu, Jul 14, 2016 at 06:51:35PM -0700, Andrey Pronin wrote: > > - sysfs_remove_link(&chip->dev.parent->kobj, "ppi"); > > - > > - for (i = chip->groups[0]->attrs; *i != NULL; ++i) > > - sysfs_remove_link(&chip->dev.parent->kobj, (*i)->name); > > + for (ngrp = 0; ngrp < chip->groups_cnt; ++ngrp) { > > + if (chip->groups[ngrp]->name) { > > + sysfs_remove_link(&chip->dev.parent->kobj, > > + chip->groups[ngrp]->name); > > + } else { > > + for (i = chip->groups[ngrp]->attrs; *i != NULL; ++i) > > + sysfs_remove_link(&chip->dev.parent->kobj, > > + (*i)->name); > > + } > > + } > > NAK > > No new compat symlinks. Only the existing set of links are permitted. > > Any new sysfs entries must use only the new location. > > > +static struct attribute *tpm2_dev_attrs[] = { > > NULL, > > }; > > > +static const struct attribute_group tpm2_dev_group = { > > + .attrs = tpm2_dev_attrs, > > +}; > > Don't add dead code, add this and related in the patch that requires it. > > > void tpm_sysfs_add_device(struct tpm_chip *chip) > > { > > /* The sysfs routines rely on an implicit tpm_try_get_ops, device_del > > @@ -290,4 +306,8 @@ void tpm_sysfs_add_device(struct tpm_chip *chip) > > */ > > WARN_ON(chip->groups_cnt != 0); > > chip->groups[chip->groups_cnt++] = &tpm_dev_group; > > + if (chip->flags & TPM_CHIP_FLAG_TPM2) > > + chip->groups[chip->groups_cnt++] = &tpm2_dev_group; > > + else > > + chip->groups[chip->groups_cnt++] = &tpm1_dev_group; > > .. and this can't really happen either.. > > To make things simple you can just have tpm2 not ever create any links > for any files by never using groups[0]. There is no need to try and > create a shared 'tpm_dev_group'. > > Jason
Hi Jason, Mostly understood. One question. tpm2 shares some of the attributes with tpm1 (e.g. timeouts). Do I still just add those separately for tpm2 to groups[1] and keep groups[0] empty? Andrey