From e60dc703729b117d0b617249bcae373a430ebade Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Mon, 24 Nov 2014 17:58:01 +0000 Subject: 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 Cc: Benjamin Herrenschmidt Cc: Rob Herring Cc: Pantelis Antoniou Cc: (cherry picked from commit f5242e5a883bf1c1aba6bfd87b85e7dda0e62191) Signed-off-by: Mark Brown Conflicts: arch/powerpc/platforms/pseries/hotplug-memory.c include/linux/of.h --- arch/powerpc/mm/numa.c | 3 +- arch/powerpc/platforms/pseries/hotplug-cpu.c | 7 ++-- arch/powerpc/platforms/pseries/hotplug-memory.c | 11 +++---- 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 | 44 ++++++++++++++++++------- 8 files changed, 71 insertions(+), 49 deletions(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 88c0425dc0a8..92c456ce1f87 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1539,12 +1539,11 @@ 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 217ca5c75b20..6d4f30ac883a 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -336,16 +336,17 @@ 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 06d6e5bdde70..0282933be40c 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -198,7 +198,7 @@ static int pseries_add_memory(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; @@ -245,9 +245,9 @@ 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) { @@ -258,9 +258,8 @@ static int pseries_memory_notifier(struct notifier_block *nb, err = pseries_remove_memory(node); 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 86ae364900d6..ed02eb47ac70 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -1325,10 +1325,11 @@ 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 c11c8238797c..8a78afc870e6 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -253,9 +253,10 @@ 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 142533fbce39..01783e46f25a 100644 --- a/drivers/crypto/nx/nx-842.c +++ b/drivers/crypto/nx/nx-842.c @@ -1000,9 +1000,9 @@ 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 7e57f58d0862..bf3e53e243a1 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -84,18 +84,17 @@ 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: @@ -119,31 +118,22 @@ 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; @@ -209,7 +199,7 @@ 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)) @@ -249,8 +239,12 @@ 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); @@ -259,7 +253,7 @@ 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; } @@ -308,9 +302,13 @@ 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); @@ -319,7 +317,7 @@ 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; } @@ -497,6 +495,7 @@ 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; @@ -508,7 +507,9 @@ 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 fd4b6916324a..1596e3352326 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -74,6 +74,12 @@ 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) @@ -345,17 +351,6 @@ 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_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_attach_node(struct device_node *); extern int of_detach_node(struct device_node *); @@ -738,6 +733,12 @@ 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, 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); extern int of_changeset_apply(struct of_changeset *ocs); @@ -775,7 +776,26 @@ static inline int of_changeset_update_property(struct of_changeset *ocs, { return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); } -#endif +#else /* CONFIG_OF_DYNAMIC */ +static inline int of_reconfig_notifier_register(struct notifier_block *nb) +{ + return -EINVAL; +} +static inline int of_reconfig_notifier_unregister(struct notifier_block *nb) +{ + return -EINVAL; +} +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, + struct of_reconfig_data *arg) +{ + return -EINVAL; +} +#endif /* CONFIG_OF_DYNAMIC */ /* CONFIG_OF_RESOLVE api */ extern int of_resolve_phandles(struct device_node *tree); -- cgit v1.2.3