| Message ID | 20231128084236.157152-2-wenst@chromium.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | platform/chrome: Introduce DT hardware prober | expand |
Hi, On Tue, Nov 28, 2023 at 12:45 AM Chen-Yu Tsai <wenst@chromium.org> wrote: > > @@ -1039,3 +1039,50 @@ int of_changeset_add_prop_u32_array(struct of_changeset *ocs, > return ret; > } > EXPORT_SYMBOL_GPL(of_changeset_add_prop_u32_array); > + > +static int of_changeset_update_prop_helper(struct of_changeset *ocs, > + struct device_node *np, > + const struct property *pp) > +{ > + struct property *new_pp; > + int ret; > + > + new_pp = __of_prop_dup(pp, GFP_KERNEL); > + if (!new_pp) > + return -ENOMEM; > + > + ret = of_changeset_update_property(ocs, np, new_pp); > + if (ret) { > + kfree(new_pp->name); > + kfree(new_pp->value); > + kfree(new_pp); Given that this is the 3rd copy of the freeing logic, does it make sense to make __of_prop_free() that's documented to free what was returned by __of_prop_dupe()?
On Sat, Dec 2, 2023 at 9:01 AM Doug Anderson <dianders@chromium.org> wrote: > > Hi, > > On Tue, Nov 28, 2023 at 12:45 AM Chen-Yu Tsai <wenst@chromium.org> wrote: > > > > @@ -1039,3 +1039,50 @@ int of_changeset_add_prop_u32_array(struct of_changeset *ocs, > > return ret; > > } > > EXPORT_SYMBOL_GPL(of_changeset_add_prop_u32_array); > > + > > +static int of_changeset_update_prop_helper(struct of_changeset *ocs, > > + struct device_node *np, > > + const struct property *pp) > > +{ > > + struct property *new_pp; > > + int ret; > > + > > + new_pp = __of_prop_dup(pp, GFP_KERNEL); > > + if (!new_pp) > > + return -ENOMEM; > > + > > + ret = of_changeset_update_property(ocs, np, new_pp); > > + if (ret) { > > + kfree(new_pp->name); > > + kfree(new_pp->value); > > + kfree(new_pp); > > Given that this is the 3rd copy of the freeing logic, does it make > sense to make __of_prop_free() that's documented to free what was > returned by __of_prop_dupe()? Makes sense. There's also one in property_list_free(). I'll add a patch for it. ChenYu
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index f63250c650ca..d22aad938667 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -1039,3 +1039,50 @@ int of_changeset_add_prop_u32_array(struct of_changeset *ocs, return ret; } EXPORT_SYMBOL_GPL(of_changeset_add_prop_u32_array); + +static int of_changeset_update_prop_helper(struct of_changeset *ocs, + struct device_node *np, + const struct property *pp) +{ + struct property *new_pp; + int ret; + + new_pp = __of_prop_dup(pp, GFP_KERNEL); + if (!new_pp) + return -ENOMEM; + + ret = of_changeset_update_property(ocs, np, new_pp); + if (ret) { + kfree(new_pp->name); + kfree(new_pp->value); + kfree(new_pp); + } + + return ret; +} + +/** + * of_changeset_update_prop_string - Add a string property update to a changeset + * + * @ocs: changeset pointer + * @np: device node pointer + * @prop_name: name of the property to be updated + * @str: pointer to null terminated string + * + * Create a string property to be updated and add it to a changeset. + * + * Return: 0 on success, a negative error value in case of an error. + */ +int of_changeset_update_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str) +{ + struct property prop; + + prop.name = (char *)prop_name; + prop.length = strlen(str) + 1; + prop.value = (void *)str; + + return of_changeset_update_prop_helper(ocs, np, &prop); +} +EXPORT_SYMBOL_GPL(of_changeset_update_prop_string); diff --git a/include/linux/of.h b/include/linux/of.h index 6a9ddf20e79a..c69bc7da380e 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1601,6 +1601,9 @@ static inline int of_changeset_add_prop_u32(struct of_changeset *ocs, { return of_changeset_add_prop_u32_array(ocs, np, prop_name, &val, 1); } +int of_changeset_update_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str); #else /* CONFIG_OF_DYNAMIC */ static inline int of_reconfig_notifier_register(struct notifier_block *nb)
Add a helper function to add string property updates to an OF changeset. This is similar to of_changeset_add_prop_string(), but instead of adding the property (and failing if it exists), it will update the property. This shall be used later in the DT hardware prober. Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- New patch added in v3. --- drivers/of/dynamic.c | 47 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/of.h | 3 +++ 2 files changed, 50 insertions(+)