The patch applies code cleanup to RPA modules to address following
issues and it shouldn't affect the logic:
* Coding style issue: removed unnecessary "break" for default case
in switch statement and added default case; removed unnecessary
braces or parenthese for if or return statements; removed
unecessary return statements
* Refactor rpaphp_get_sensor_state() and find_php_slot_pci_node()
to avoid nested if statements
* Drop is_registered(), is_php_type(), is_dlpar_capable()
Signed-off-by: Gavin Shan <gws...@linux.vnet.ibm.com>
---
drivers/pci/hotplug/rpadlpar_core.c | 90 +++++++++++++++++++------------------
drivers/pci/hotplug/rpaphp_core.c | 57 ++++++++++-------------
drivers/pci/hotplug/rpaphp_pci.c | 43 +++++++++---------
drivers/pci/hotplug/rpaphp_slot.c | 25 ++++-------
4 files changed, 101 insertions(+), 114 deletions(-)
diff --git a/drivers/pci/hotplug/rpadlpar_core.c
b/drivers/pci/hotplug/rpadlpar_core.c
index 7660232..35da3b3 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -52,30 +52,35 @@ static struct device_node *find_vio_slot_node(char
*drc_name)
while ((dn = of_get_next_child(parent, dn))) {
rc = rpaphp_get_drc_props(dn, NULL, &name, NULL, NULL);
- if ((rc == 0) && (!strcmp(drc_name, name)))
- break;
+ if (rc)
+ continue;
+
+ if (!strcmp(drc_name, name))
+ return dn;
}
- return dn;
+ return NULL;
}
/* Find dlpar-capable pci node that contains the specified name and type */
static struct device_node *find_php_slot_pci_node(char *drc_name,
char *drc_type)
{
- struct device_node *np = NULL;
+ struct device_node *dn = NULL;
char *name;
char *type;
int rc;
- while ((np = of_find_node_by_name(np, "pci"))) {
- rc = rpaphp_get_drc_props(np, NULL, &name, &type, NULL);
- if (rc == 0)
- if (!strcmp(drc_name, name) && !strcmp(drc_type, type))
- break;
+ while ((dn = of_find_node_by_name(dn, "pci"))) {
+ rc = rpaphp_get_drc_props(dn, NULL, &name, &type, NULL);
+ if (rc)
+ continue;
+
+ if (!strcmp(drc_name, name) && !strcmp(drc_type, type))
+ return dn;
}
- return np;
+ return NULL;
}
static struct device_node *find_dlpar_node(char *drc_name, int *node_type)
@@ -239,10 +244,9 @@ static int dlpar_add_phb(char *drc_name, struct
device_node *dn)
{
struct pci_controller *phb;
- if (PCI_DN(dn) && PCI_DN(dn)->phb) {
- /* PHB already exists */
+ /* PHB already exists */
+ if (PCI_DN(dn) && PCI_DN(dn)->phb)
return -EINVAL;
- }
phb = init_phb_dynamic(dn);
if (!phb)
@@ -299,15 +303,18 @@ int dlpar_add_slot(char *drc_name)
}
switch (node_type) {
- case NODE_TYPE_VIO:
- rc = dlpar_add_vio_slot(drc_name, dn);
- break;
- case NODE_TYPE_SLOT:
- rc = dlpar_add_pci_slot(drc_name, dn);
- break;
- case NODE_TYPE_PHB:
- rc = dlpar_add_phb(drc_name, dn);
- break;
+ case NODE_TYPE_VIO:
+ rc = dlpar_add_vio_slot(drc_name, dn);
+ break;
+ case NODE_TYPE_SLOT:
+ rc = dlpar_add_pci_slot(drc_name, dn);
+ break;
+ case NODE_TYPE_PHB:
+ rc = dlpar_add_phb(drc_name, dn);
+ break;
+ default:
+ rc = -EINVAL;
+ goto exit;
}
printk(KERN_INFO "%s: slot %s added\n", DLPAR_MODULE_NAME, drc_name);
@@ -429,15 +436,18 @@ int dlpar_remove_slot(char *drc_name)
}
switch (node_type) {
- case NODE_TYPE_VIO:
- rc = dlpar_remove_vio_slot(drc_name, dn);
- break;
- case NODE_TYPE_PHB:
- rc = dlpar_remove_phb(drc_name, dn);
- break;
- case NODE_TYPE_SLOT:
- rc = dlpar_remove_pci_slot(drc_name, dn);
- break;
+ case NODE_TYPE_VIO:
+ rc = dlpar_remove_vio_slot(drc_name, dn);
+ break;
+ case NODE_TYPE_PHB:
+ rc = dlpar_remove_phb(drc_name, dn);
+ break;
+ case NODE_TYPE_SLOT:
+ rc = dlpar_remove_pci_slot(drc_name, dn);
+ break;
+ default:
+ rc = -EINVAL;
+ goto exit;
}
vm_unmap_aliases();
@@ -447,20 +457,15 @@ exit:
return rc;
}
-static inline int is_dlpar_capable(void)
-{
- int rc = rtas_token("ibm,configure-connector");
-
- return (int) (rc != RTAS_UNKNOWN_SERVICE);
-}
-
-int __init rpadlpar_io_init(void)
+static int __init rpadlpar_io_init(void)
{
int rc = 0;
- if (!is_dlpar_capable()) {
+ /* Check if we have DLPAR capability */
+ rc = rtas_token("ibm,configure-connector");
+ if (rc == RTAS_UNKNOWN_SERVICE) {
printk(KERN_WARNING "%s: partition not DLPAR capable\n",
- __func__);
+ __func__);
return -EPERM;
}
@@ -468,10 +473,9 @@ int __init rpadlpar_io_init(void)
return rc;
}
-void rpadlpar_io_exit(void)
+static void __exit rpadlpar_io_exit(void)
{
dlpar_sysfs_exit();
- return;
}
module_init(rpadlpar_io_init);
diff --git a/drivers/pci/hotplug/rpaphp_core.c
b/drivers/pci/hotplug/rpaphp_core.c
index f2945fa..ff800df 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -74,7 +74,6 @@ static int set_attention_status(struct hotplug_slot
*hotplug_slot, u8 value)
break;
default:
value = 1;
- break;
}
rc = rtas_set_indicator(DR_INDICATOR, slot->index, value);
@@ -94,7 +93,7 @@ static int get_power_status(struct hotplug_slot
*hotplug_slot, u8 *value)
int retval, level;
struct slot *slot = (struct slot *)hotplug_slot->private;
- retval = rtas_get_power_level (slot->power_domain, &level);
+ retval = rtas_get_power_level(slot->power_domain, &level);
if (!retval)
*value = level;
return retval;
@@ -161,7 +160,6 @@ static enum pci_bus_speed get_max_bus_speed(struct slot
*slot)
break;
default:
speed = PCI_SPEED_UNKNOWN;
- break;
}
return speed;
@@ -178,17 +176,17 @@ static int get_children_props(struct device_node *dn,
const int **drc_indexes,
types = of_get_property(dn, "ibm,drc-types", NULL);
domains = of_get_property(dn, "ibm,drc-power-domains", NULL);
- if (!indexes || !names || !types || !domains) {
- /* Slot does not have dynamically-removable children */
+ /* Slot does not have dynamically-removable children */
+ if (!indexes || !names || !types || !domains)
return -EINVAL;
- }
+
if (drc_indexes)
*drc_indexes = indexes;
+ /* &drc_names[1] contains NULL terminated slot names */
if (drc_names)
- /* &drc_names[1] contains NULL terminated slot names */
*drc_names = names;
+ /* &drc_types[1] contains NULL terminated slot types */
if (drc_types)
- /* &drc_types[1] contains NULL terminated slot types */
*drc_types = types;
if (drc_power_domains)
*drc_power_domains = domains;
@@ -210,15 +208,13 @@ int rpaphp_get_drc_props(struct device_node *dn, int
*drc_index,
int i, rc;
my_index = of_get_property(dn, "ibm,my-drc-index", NULL);
- if (!my_index) {
- /* Node isn't DLPAR/hotplug capable */
+ /* Node isn't DLPAR/hotplug capable */
+ if (!my_index)
return -EINVAL;
- }
rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
- if (rc < 0) {
+ if (rc < 0)
return -EINVAL;
- }
name_tmp = (char *) &names[1];
type_tmp = (char *) &types[1];
@@ -244,21 +240,8 @@ int rpaphp_get_drc_props(struct device_node *dn, int
*drc_index,
}
EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);
-static int is_php_type(char *drc_type)
-{
- unsigned long value;
- char *endptr;
-
- /* PCI Hotplug nodes have an integer for drc_type */
- value = simple_strtoul(drc_type, &endptr, 10);
- if (endptr == drc_type)
- return 0;
-
- return 1;
-}
-
/**
- * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0
+ * is_php_dn() - return true if this is a hotpluggable pci slot, else false
* @dn: target &device_node
* @indexes: passed to get_children_props()
* @names: passed to get_children_props()
@@ -270,21 +253,28 @@ static int is_php_type(char *drc_type)
* for built-in pci slots (even when the built-in slots are
* dlparable.)
*/
-static int is_php_dn(struct device_node *dn, const int **indexes,
- const int **names, const int **types, const int **power_domains)
+static bool is_php_dn(struct device_node *dn,
+ const int **indexes, const int **names,
+ const int **types, const int **power_domains)
{
const int *drc_types;
+ const char *drc_type_str;
+ char *endptr;
+ unsigned long val;
int rc;
rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
if (rc < 0)
- return 0;
+ return false;
- if (!is_php_type((char *) &drc_types[1]))
- return 0;
+ /* PCI Hotplug nodes have an integer for drc_type */
+ drc_type_str = (char *)&drc_types[1];
+ val = simple_strtoul(drc_type_str, &endptr, 10);
+ if (endptr == drc_type_str)
+ return false;
*types = drc_types;
- return 1;
+ return true;
}
/**
@@ -370,7 +360,6 @@ static void __exit cleanup_slots(void)
list_del(&slot->rpaphp_slot_list);
pci_hp_deregister(slot->hotplug_slot);
}
- return;
}
static int __init rpaphp_init(void)
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 9243f3e7..a4aa65c 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -38,30 +38,31 @@ int rpaphp_get_sensor_state(struct slot *slot, int *state)
int setlevel;
rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
+ if (rc >= 0)
+ return rc;
+ if (rc != -EFAULT && rc != -EEXIST) {
+ err("%s: Failure %d getting sensor state on slot[%s]\n",
+ __func__, rc, slot->name);
+ return rc;
+ }
+
+ /*
+ * Some slots have to be powered up before
+ * get-sensor will succeed
+ */
+ dbg("%s: Slot[%s] must be power up to get sensor-state\n",
+ __func__, slot->name);
+ rc = rtas_set_power_level(slot->power_domain, POWER_ON,
+ &setlevel);
if (rc < 0) {
- if (rc == -EFAULT || rc == -EEXIST) {
- dbg("%s: slot must be power up to get sensor-state\n",
- __func__);
-
- /* some slots have to be powered up
- * before get-sensor will succeed.
- */
- rc = rtas_set_power_level(slot->power_domain, POWER_ON,
- &setlevel);
- if (rc < 0) {
- dbg("%s: power on slot[%s] failed rc=%d.\n",
- __func__, slot->name, rc);
- } else {
- rc = rtas_get_sensor(DR_ENTITY_SENSE,
- slot->index, state);
- }
- } else if (rc == -ENODEV)
- info("%s: slot is unusable\n", __func__);
- else
- err("%s failed to get sensor state\n", __func__);
+ dbg("%s: Failure %d powerng on slot[%s]\n",
+ __func__, rc, slot->name);
+ return rc;
}
- return rc;
+
+ return rtas_get_sensor(DR_ENTITY_SENSE,
+ slot->index, state);
}
/**
diff --git a/drivers/pci/hotplug/rpaphp_slot.c
b/drivers/pci/hotplug/rpaphp_slot.c
index a6082cc..be48e69 100644
--- a/drivers/pci/hotplug/rpaphp_slot.c
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -72,7 +72,7 @@ struct slot *alloc_slot_struct(struct device_node *dn,
slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
slot->hotplug_slot->release = &rpaphp_release_slot;
- return (slot);
+ return slot;
error_info:
kfree(slot->hotplug_slot->info);
@@ -84,17 +84,6 @@ error_nomem:
return NULL;
}
-static int is_registered(struct slot *slot)
-{
- struct slot *tmp_slot;
-
- list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
- if (!strcmp(tmp_slot->name, slot->name))
- return 1;
- }
- return 0;
-}
-
int rpaphp_deregister_slot(struct slot *slot)
{
int retval = 0;
@@ -117,6 +106,7 @@ EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
int rpaphp_register_slot(struct slot *slot)
{
struct hotplug_slot *php_slot = slot->hotplug_slot;
+ struct slot *tmp;
int retval;
int slotno;
@@ -124,10 +114,13 @@ int rpaphp_register_slot(struct slot *slot)
__func__, slot->dn->full_name, slot->index, slot->name,
slot->power_domain, slot->type);
- /* should not try to register the same slot twice */
- if (is_registered(slot)) {
- err("rpaphp_register_slot: slot[%s] is already registered\n",
slot->name);
- return -EAGAIN;
+ /* Should not try to register the same slot twice */
+ list_for_each_entry(tmp, &rpaphp_slot_head, rpaphp_slot_list) {
+ if (!strcmp(tmp->name, slot->name)) {
+ err("%s: Slot[%s] is already registered\n",
+ __func__, slot->name);
+ return -EAGAIN;
+ }
}
if (slot->dn->child)
--
1.8.3.2
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