On Thu, 17 Apr 2014 15:48:29 +0800, Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx> wrote:
> The of_update_property() is intented to update a property in a node
> and if the property does not exist, will add it.
>
> The second search of the property is possibly won't be found, that
> maybe removed by other thread just before the second search begain.
>
> Using the __of_find_property() and __of_add_property() instead and
> move them into lock operations.
Applied with context fixups, thanks.
g.
>
> Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
> ---
> drivers/of/base.c | 18 +++++++-----------
> 1 file changed, 7 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index be2861d..06623d0c 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1767,7 +1767,7 @@ int of_update_property(struct device_node *np, struct property *newprop)
> {
> struct property **next, *oldprop;
> unsigned long flags;
> - int rc, found = 0;
> + int rc;
>
> rc = of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop);
> if (rc)
> @@ -1776,20 +1776,19 @@ int of_update_property(struct device_node *np, struct property *newprop)
> if (!newprop->name)
> return -EINVAL;
>
> - oldprop = of_find_property(np, newprop->name, NULL);
> - if (!oldprop)
> - return of_add_property(np, newprop);
> -
> raw_spin_lock_irqsave(&devtree_lock, flags);
> next = &np->properties;
> - while (*next) {
> + oldprop = __of_find_property(np, newprop->name, NULL);
> + if (!oldprop) {
> + /* add the new node */
> + rc = __of_add_property(np, newprop);
> + } else while (*next) {
> + /* found the node and then replace it */
> if (*next == oldprop) {
> - /* found the node */
> newprop->next = oldprop->next;
> *next = newprop;
> oldprop->next = np->deadprops;
> np->deadprops = oldprop;
> - found = 1;
> break;
> }
> next = &(*next)->next;
> @@ -1803,9 +1802,6 @@ int of_update_property(struct device_node *np, struct property *newprop)
> sysfs_remove_bin_file(&np->kobj, &oldprop->attr);
> __of_add_property_sysfs(np, newprop);
>
> - if (!found)
> - return -ENODEV;
> -
> return 0;
> }
>
> --
> 1.8.4
>
>
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
