[PATCH v2 07/14] of/reconfig: Always use the same structure for notifiers
From: Grant Likely
Date: Mon Nov 24 2014 - 17:38:16 EST
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@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
Cc: <linuxppc-dev@xxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/numa.c | 3 +-
arch/powerpc/platforms/pseries/hotplug-cpu.c | 7 +++--
arch/powerpc/platforms/pseries/hotplug-memory.c | 15 +++++----
arch/powerpc/platforms/pseries/iommu.c | 5 +--
arch/powerpc/platforms/pseries/setup.c | 5 +--
drivers/crypto/nx/nx-842.c | 4 +--
drivers/of/dynamic.c | 41 +++++++++++++------------
include/linux/of.h | 23 ++++++++------
8 files changed, 54 insertions(+), 49 deletions(-)
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index b9d1dfdbe5bb..9fe6002c1d5a 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1711,12 +1711,11 @@ static void stage_topology_update(int core_id)
static int dt_update_callback(struct notifier_block *nb,
unsigned long action, void *data)
{
- struct of_prop_reconfig *update;
+ struct of_reconfig_data *update = data;
int rc = NOTIFY_DONE;
switch (action) {
case OF_RECONFIG_UPDATE_PROPERTY:
- update = (struct of_prop_reconfig *)data;
if (!of_prop_cmp(update->dn->type, "cpu") &&
!of_prop_cmp(update->prop->name, "ibm,associativity")) {
u32 core_id;
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 5c375f93c669..f30cf4d136a4 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -340,16 +340,17 @@ static void pseries_remove_processor(struct device_node *np)
}
static int pseries_smp_notifier(struct notifier_block *nb,
- unsigned long action, void *node)
+ unsigned long action, void *data)
{
+ struct of_reconfig_data *rd = data;
int err = 0;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
- err = pseries_add_processor(node);
+ err = pseries_add_processor(rd->dn);
break;
case OF_RECONFIG_DETACH_NODE:
- pseries_remove_processor(node);
+ pseries_remove_processor(rd->dn);
break;
}
return notifier_from_errno(err);
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 3c4c0dcd90d3..1bbb78fab530 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -183,7 +183,7 @@ static int pseries_add_mem_node(struct device_node *np)
return (ret < 0) ? -EINVAL : 0;
}
-static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
+static int pseries_update_drconf_memory(struct of_reconfig_data *pr)
{
struct of_drconf_cell *new_drmem, *old_drmem;
unsigned long memblock_size;
@@ -232,22 +232,21 @@ static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
}
static int pseries_memory_notifier(struct notifier_block *nb,
- unsigned long action, void *node)
+ unsigned long action, void *data)
{
- struct of_prop_reconfig *pr;
+ struct of_reconfig_data *rd = data;
int err = 0;
switch (action) {
case OF_RECONFIG_ATTACH_NODE:
- err = pseries_add_mem_node(node);
+ err = pseries_add_mem_node(rd->dn);
break;
case OF_RECONFIG_DETACH_NODE:
- err = pseries_remove_mem_node(node);
+ err = pseries_remove_mem_node(rd->dn);
break;
case OF_RECONFIG_UPDATE_PROPERTY:
- pr = (struct of_prop_reconfig *)node;
- if (!strcmp(pr->prop->name, "ibm,dynamic-memory"))
- err = pseries_update_drconf_memory(pr);
+ if (!strcmp(rd->prop->name, "ibm,dynamic-memory"))
+ err = pseries_update_drconf_memory(rd);
break;
}
return notifier_from_errno(err);
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index e32e00976a94..3e5bfdafee63 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -1251,10 +1251,11 @@ static struct notifier_block iommu_mem_nb = {
.notifier_call = iommu_mem_notifier,
};
-static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
+static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
{
int err = NOTIFY_OK;
- struct device_node *np = node;
+ struct of_reconfig_data *rd = data;
+ struct device_node *np = rd->dn;
struct pci_dn *pci = PCI_DN(np);
struct direct_window *window;
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 125c589eeef5..ed8a90022a3d 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -251,9 +251,10 @@ static void __init pseries_discover_pic(void)
" interrupt-controller\n");
}
-static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
+static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
{
- struct device_node *np = node;
+ struct of_reconfig_data *rd = data;
+ struct device_node *np = rd->dn;
struct pci_dn *pci = NULL;
int err = NOTIFY_OK;
diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c
index 061407d59520..887196e9b50c 100644
--- a/drivers/crypto/nx/nx-842.c
+++ b/drivers/crypto/nx/nx-842.c
@@ -1009,9 +1009,9 @@ error_out:
* notifier_to_errno() to decode this value
*/
static int nx842_OF_notifier(struct notifier_block *np, unsigned long action,
- void *update)
+ void *data)
{
- struct of_prop_reconfig *upd = update;
+ struct of_reconfig_data *upd = data;
struct nx842_devdata *local_devdata;
struct device_node *node = NULL;
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index cc106529dca8..3351ef408125 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -87,18 +87,17 @@ const char *action_names[] = {
};
#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 @@ int of_reconfig_notify(unsigned long action, void *p)
* 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 @@ EXPORT_SYMBOL_GPL(of_reconfig_get_state_change);
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 @@ void __of_attach_node(struct device_node *np)
*/
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 @@ int of_attach_node(struct device_node *np)
__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 @@ void __of_detach_node(struct device_node *np)
*/
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 @@ int of_detach_node(struct device_node *np)
__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_invert(struct of_changeset_entry *ce,
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 @@ static void __of_changeset_entry_notify(struct of_changeset_entry *ce, bool reve
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:
diff --git a/include/linux/of.h b/include/linux/of.h
index b59ee21933a4..fe1dec87fd68 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -73,6 +73,12 @@ struct of_phandle_args {
uint32_t args[MAX_PHANDLE_ARGS];
};
+struct of_reconfig_data {
+ struct device_node *dn;
+ struct property *prop;
+ struct property *old_prop;
+};
+
/* initialize a node */
extern struct kobj_type of_node_ktype;
static inline void of_node_init(struct device_node *node)
@@ -318,12 +324,6 @@ extern int of_update_property(struct device_node *np, struct property *newprop);
#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
-struct of_prop_reconfig {
- struct device_node *dn;
- struct property *prop;
- struct property *old_prop;
-};
-
extern int of_attach_node(struct device_node *);
extern int of_detach_node(struct device_node *);
@@ -892,8 +892,9 @@ enum of_reconfig_change {
#ifdef CONFIG_OF_DYNAMIC
extern int of_reconfig_notifier_register(struct notifier_block *);
extern int of_reconfig_notifier_unregister(struct notifier_block *);
-extern int of_reconfig_notify(unsigned long, void *);
-extern int of_reconfig_get_state_change(unsigned long action, void *arg);
+extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
+extern int of_reconfig_get_state_change(unsigned long action,
+ struct of_reconfig_data *arg);
extern void of_changeset_init(struct of_changeset *ocs);
extern void of_changeset_destroy(struct of_changeset *ocs);
@@ -941,11 +942,13 @@ static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
{
return -EINVAL;
}
-static inline int of_reconfig_notify(unsigned long action, void *arg)
+static inline int of_reconfig_notify(unsigned long action,
+ struct of_reconfig_data *arg)
{
return -EINVAL;
}
-static inline int of_reconfig_get_state_change(unsigned long action, void *arg)
+static inline int of_reconfig_get_state_change(unsigned long action,
+ struct of_reconfig_data *arg)
{
return -EINVAL;
}
--
1.9.1
--
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