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Subject[PATCH v2 10/13] PCI: rpaphp: stop managing hotplug_slot->name
Date
We no longer need to manage our version of hotplug_slot->name
since the PCI and hotplug core manage it on our behalf.

This means that alloc_slot_struct() no longer needs to take
a 'name' param. On the other hand, we give rpaphp_register_slot()
a 'name' param now to simplify the hotplug registration process.
rpaphp_register_slot() can directly pass the drc_name to the
PCI hotplug core.

Cc: jbarnes@virtuousgeek.org
Cc: kristen.c.accardi@intel.com
Cc: benh@kernel.crashing.org
Signed-off-by: Alex Chiang <achiang@hp.com>
---
drivers/pci/hotplug/rpaphp.h | 10 +++++++---
drivers/pci/hotplug/rpaphp_core.c | 6 +++---
drivers/pci/hotplug/rpaphp_pci.c | 4 ++--
drivers/pci/hotplug/rpaphp_slot.c | 26 +++++++++-----------------
4 files changed, 21 insertions(+), 25 deletions(-)
diff --git a/drivers/pci/hotplug/rpaphp.h b/drivers/pci/hotplug/rpaphp.h
index 7d5921b..12f8aa7 100644
--- a/drivers/pci/hotplug/rpaphp.h
+++ b/drivers/pci/hotplug/rpaphp.h
@@ -73,13 +73,17 @@ struct slot {
u32 index;
u32 type;
u32 power_domain;
- char *name;
struct device_node *dn;
struct pci_bus *bus;
struct list_head *pci_devs;
struct hotplug_slot *hotplug_slot;
};

+static inline const char *slot_name(struct slot *slot)
+{
+ return hotplug_slot_name(slot->hotplug_slot);
+}
+
extern struct hotplug_slot_ops rpaphp_hotplug_slot_ops;
extern struct list_head rpaphp_slot_head;

@@ -96,8 +100,8 @@ extern int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,

/* rpaphp_slot.c */
extern void dealloc_slot_struct(struct slot *slot);
-extern struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain);
-extern int rpaphp_register_slot(struct slot *slot);
+extern struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, int power_domain);
+extern int rpaphp_register_slot(struct slot *slot, const char *name);
extern int rpaphp_deregister_slot(struct slot *slot);

#endif /* _PPC64PHP_H */
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index 1f84f40..c989005 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -324,7 +324,7 @@ int rpaphp_add_slot(struct device_node *dn)
type = (char *) &types[1];
for (i = 0; i < indexes[0]; i++) {

- slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
+ slot = alloc_slot_struct(dn, indexes[i + 1], power_domains[i + 1]);
if (!slot)
return -ENOMEM;

@@ -335,7 +335,7 @@ int rpaphp_add_slot(struct device_node *dn)

retval = rpaphp_enable_slot(slot);
if (!retval)
- retval = rpaphp_register_slot(slot);
+ retval = rpaphp_register_slot(slot, name);

if (retval)
dealloc_slot_struct(slot);
@@ -404,7 +404,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
} else if (state == EMPTY) {
slot->state = EMPTY;
} else {
- err("%s: slot[%s] is in invalid state\n", __func__, slot->name);
+ err("%s: slot[%s] is in invalid state\n", __func__, slot_name(slot));
slot->state = NOT_VALID;
return -EINVAL;
}
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 5acfd4f..46eed88 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -51,7 +51,7 @@ int rpaphp_get_sensor_state(struct slot *slot, int *state)
&setlevel);
if (rc < 0) {
dbg("%s: power on slot[%s] failed rc=%d.\n",
- __func__, slot->name, rc);
+ __func__, slot_name(slot), rc);
} else {
rc = rtas_get_sensor(DR_ENTITY_SENSE,
slot->index, state);
@@ -111,7 +111,7 @@ int rpaphp_enable_slot(struct slot *slot)
/* non-empty slot has to have child */
if (!slot->dn->child) {
err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
- __func__, slot->name);
+ __func__, slot_name(slot));
return -EINVAL;
}

diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c
index 736d3b4..2d167c3 100644
--- a/drivers/pci/hotplug/rpaphp_slot.c
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -43,13 +43,12 @@ static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
void dealloc_slot_struct(struct slot *slot)
{
kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot->name);
kfree(slot->hotplug_slot);
kfree(slot);
}

struct slot *alloc_slot_struct(struct device_node *dn,
- int drc_index, char *drc_name, int power_domain)
+ int drc_index, int power_domain)
{
struct slot *slot;

@@ -63,11 +62,6 @@ struct slot *alloc_slot_struct(struct device_node *dn,
GFP_KERNEL);
if (!slot->hotplug_slot->info)
goto error_hpslot;
- slot->hotplug_slot->name = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
- if (!slot->hotplug_slot->name)
- goto error_info;
- slot->name = slot->hotplug_slot->name;
- strcpy(slot->name, drc_name);
slot->dn = dn;
slot->index = drc_index;
slot->power_domain = power_domain;
@@ -77,8 +71,6 @@ struct slot *alloc_slot_struct(struct device_node *dn,

return (slot);

-error_info:
- kfree(slot->hotplug_slot->info);
error_hpslot:
kfree(slot->hotplug_slot);
error_slot:
@@ -92,7 +84,7 @@ 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))
+ if (!strcmp(slot_name(tmp_slot), slot_name(slot)))
return 1;
}
return 0;
@@ -104,32 +96,32 @@ int rpaphp_deregister_slot(struct slot *slot)
struct hotplug_slot *php_slot = slot->hotplug_slot;

dbg("%s - Entry: deregistering slot=%s\n",
- __func__, slot->name);
+ __func__, slot_name(slot));

list_del(&slot->rpaphp_slot_list);

retval = pci_hp_deregister(php_slot);
if (retval)
- err("Problem unregistering a slot %s\n", slot->name);
+ err("Problem unregistering a slot %s\n", slot_name(slot));

dbg("%s - Exit: rc[%d]\n", __func__, retval);
return retval;
}
EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);

-int rpaphp_register_slot(struct slot *slot)
+int rpaphp_register_slot(struct slot *slot, const char *name)
{
struct hotplug_slot *php_slot = slot->hotplug_slot;
int retval;
int slotno;

dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
- __func__, slot->dn->full_name, slot->index, slot->name,
+ __func__, slot->dn->full_name, slot->index, slot_name(slot),
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);
+ err("rpaphp_register_slot: slot[%s] is already registered\n", slot_name(slot));
return -EAGAIN;
}

@@ -137,7 +129,7 @@ int rpaphp_register_slot(struct slot *slot)
slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
else
slotno = -1;
- retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name);
+ retval = pci_hp_register(php_slot, slot->bus, slotno, name);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
return retval;
@@ -145,7 +137,7 @@ int rpaphp_register_slot(struct slot *slot)

/* add slot to our internal list */
list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
- info("Slot [%s] registered\n", slot->name);
+ info("Slot [%s] registered\n", name);
return 0;
}



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