of/reconfig: Always use the same structure for notifiers
The OF_RECONFIG notifier callback uses a different structure depending
on whether it is a node change or a property change. This is silly, and
not very safe. Rework the code to use the same data structure regardless
of the type of notifier.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Cc: <linuxppc-dev@lists.ozlabs.org>
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index cc10652..3351ef4 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -87,18 +87,17 @@
};
#endif
-int of_reconfig_notify(unsigned long action, void *p)
+int of_reconfig_notify(unsigned long action, struct of_reconfig_data *p)
{
int rc;
#ifdef DEBUG
- struct device_node *dn = p;
- struct of_prop_reconfig *pr = p;
+ struct of_reconfig_data *pr = p;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
case OF_RECONFIG_DETACH_NODE:
pr_debug("of/notify %-15s %s\n", action_names[action],
- dn->full_name);
+ pr->dn->full_name);
break;
case OF_RECONFIG_ADD_PROPERTY:
case OF_RECONFIG_REMOVE_PROPERTY:
@@ -122,31 +121,22 @@
* Returns 0 on device going from enabled to disabled, 1 on device
* going from disabled to enabled and -1 on no change.
*/
-int of_reconfig_get_state_change(unsigned long action, void *arg)
+int of_reconfig_get_state_change(unsigned long action, struct of_reconfig_data *pr)
{
- struct device_node *dn;
- struct property *prop, *old_prop;
- struct of_prop_reconfig *pr;
+ struct property *prop, *old_prop = NULL;
int is_status, status_state, old_status_state, prev_state, new_state;
/* figure out if a device should be created or destroyed */
- dn = NULL;
- prop = old_prop = NULL;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
case OF_RECONFIG_DETACH_NODE:
- dn = arg;
- prop = of_find_property(dn, "status", NULL);
+ prop = of_find_property(pr->dn, "status", NULL);
break;
case OF_RECONFIG_ADD_PROPERTY:
case OF_RECONFIG_REMOVE_PROPERTY:
- pr = arg;
- dn = pr->dn;
prop = pr->prop;
break;
case OF_RECONFIG_UPDATE_PROPERTY:
- pr = arg;
- dn = pr->dn;
prop = pr->prop;
old_prop = pr->old_prop;
break;
@@ -212,7 +202,7 @@
int of_property_notify(int action, struct device_node *np,
struct property *prop, struct property *oldprop)
{
- struct of_prop_reconfig pr;
+ struct of_reconfig_data pr;
/* only call notifiers if the node is attached */
if (!of_node_is_attached(np))
@@ -250,8 +240,12 @@
*/
int of_attach_node(struct device_node *np)
{
+ struct of_reconfig_data rd;
unsigned long flags;
+ memset(&rd, 0, sizeof(rd));
+ rd.dn = np;
+
mutex_lock(&of_mutex);
raw_spin_lock_irqsave(&devtree_lock, flags);
__of_attach_node(np);
@@ -260,7 +254,7 @@
__of_attach_node_sysfs(np);
mutex_unlock(&of_mutex);
- of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np);
+ of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, &rd);
return 0;
}
@@ -298,9 +292,13 @@
*/
int of_detach_node(struct device_node *np)
{
+ struct of_reconfig_data rd;
unsigned long flags;
int rc = 0;
+ memset(&rd, 0, sizeof(rd));
+ rd.dn = np;
+
mutex_lock(&of_mutex);
raw_spin_lock_irqsave(&devtree_lock, flags);
__of_detach_node(np);
@@ -309,7 +307,7 @@
__of_detach_node_sysfs(np);
mutex_unlock(&of_mutex);
- of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np);
+ of_reconfig_notify(OF_RECONFIG_DETACH_NODE, &rd);
return rc;
}
@@ -505,6 +503,7 @@
static void __of_changeset_entry_notify(struct of_changeset_entry *ce, bool revert)
{
+ struct of_reconfig_data rd;
struct of_changeset_entry ce_inverted;
int ret;
@@ -516,7 +515,9 @@
switch (ce->action) {
case OF_RECONFIG_ATTACH_NODE:
case OF_RECONFIG_DETACH_NODE:
- ret = of_reconfig_notify(ce->action, ce->np);
+ memset(&rd, 0, sizeof(rd));
+ rd.dn = ce->np;
+ ret = of_reconfig_notify(ce->action, &rd);
break;
case OF_RECONFIG_ADD_PROPERTY:
case OF_RECONFIG_REMOVE_PROPERTY: