The notifier now includes the old_prop argument when updating
properties, propagate this API to changeset internals while
also retaining the old behaviour of retrieving the old_property
when NULL is passed.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
---
drivers/of/dynamic.c | 18 ++++++++++++++----
drivers/of/selftest.c | 2 +-
include/linux/of.h | 20 +++++++++++++-------
3 files changed, 28 insertions(+), 12 deletions(-)
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 8e8b614..9eb8528 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -627,6 +627,7 @@ int of_changeset_revert(struct of_changeset *ocs)
* @action: action to perform
* @np: Pointer to device node
* @prop: Pointer to property
+ * @old_prop: Pointer to old property (if updating)
*
* On action being one of:
* + OF_RECONFIG_ATTACH_NODE
@@ -637,10 +638,21 @@ int of_changeset_revert(struct of_changeset *ocs)
* Returns 0 on success, a negative error value in case of an error.
*/
int of_changeset_action(struct of_changeset *ocs, unsigned long action,
- struct device_node *np, struct property *prop)
+ struct device_node *np, struct property *prop,
+ struct property *oldprop)
{
struct of_changeset_entry *ce;
+ /* in case someone passed NULL as old_prop, find it */
+ if (action == OF_RECONFIG_UPDATE_PROPERTY && prop && !oldprop) {
+ oldprop = of_find_property(np, prop->name, NULL);
+ if (!oldprop) {
+ pr_err("%s: Failed to find old_prop for \"%s/%s\"\n",
+ __func__, np->full_name, prop->name);
+ return -EINVAL;
+ }
+ }
+
ce = kzalloc(sizeof(*ce), GFP_KERNEL);
if (!ce) {
pr_err("%s: Failed to allocate\n", __func__);
@@ -650,9 +662,7 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action,
ce->action = action;
ce->np = of_node_get(np);
ce->prop = prop;
-
- if (action == OF_RECONFIG_UPDATE_PROPERTY && prop)
- ce->old_prop = of_find_property(np, prop->name, NULL);
+ ce->old_prop = oldprop;
/* add it to the list */
list_add_tail(&ce->node, &ocs->entries);
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 7800127..16102fd 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -427,7 +427,7 @@ static void __init of_selftest_changeset(void)
selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
- selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+ selftest(!of_changeset_update_property(&chgset, parent, ppupdate, NULL), "fail update prop\n");
selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
mutex_lock(&of_mutex);
selftest(!of_changeset_apply(&chgset), "apply failed\n");
diff --git a/include/linux/of.h b/include/linux/of.h
index 6545e7a..71d25aa 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -830,36 +830,42 @@ extern int of_changeset_apply(struct of_changeset *ocs);
extern int of_changeset_revert(struct of_changeset *ocs);
extern int of_changeset_action(struct of_changeset *ocs,
unsigned long action, struct device_node *np,
- struct property *prop);
+ struct property *prop, struct property *old_prop);
static inline int of_changeset_attach_node(struct of_changeset *ocs,
struct device_node *np)
{
- return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
+ return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL,
+ NULL);
}
static inline int of_changeset_detach_node(struct of_changeset *ocs,
struct device_node *np)
{
- return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
+ return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL,
+ NULL);
}
static inline int of_changeset_add_property(struct of_changeset *ocs,
struct device_node *np, struct property *prop)
{
- return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
+ return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop,
+ NULL);
}
static inline int of_changeset_remove_property(struct of_changeset *ocs,
struct device_node *np, struct property *prop)
{
- return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
+ return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop,
+ NULL);
}
static inline int of_changeset_update_property(struct of_changeset *ocs,
- struct device_node *np, struct property *prop)
+ struct device_node *np, struct property *prop,
+ struct property *old_prop)
{
- return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
+ return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop,
+ old_prop);
}
#endif
--
1.7.12
--
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