linux-kernel - [PATCH 1/7] acpiphp: convert to a kmalloc'ed slot name

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Date:	Tue, 5 Aug 2008 23:10:57 -0600
From:	Alex Chiang <achiang@...com>
To:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Matthew Wilcox <matthew@....cx>,
	Pierre Ossman <drzeus-list@...eus.cx>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org
Subject: [PATCH 1/7] acpiphp: convert to a kmalloc'ed slot name


Callers of pci_hp_register() need to be converted from a
char name[] to a char *name.

This change allows pci_create_slot() to dynamically rename the
sysfs name of the slot in the event of a name collision.

Signed-off-by: Alex Chiang <achiang@...com>
---
 drivers/pci/hotplug/acpiphp.h      |    2 +-
 drivers/pci/hotplug/acpiphp_core.c |   17 ++++++++++-------
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 5a58b07..2ac519d 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -63,7 +63,7 @@ struct slot {
 	struct hotplug_slot	*hotplug_slot;
 	struct acpiphp_slot	*acpi_slot;
 	struct hotplug_slot_info info;
-	char name[SLOT_NAME_SIZE];
+	char *name;
 };
 
 /*
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index 0e496e8..ec164f4 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -301,6 +301,7 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
 
 	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 
+	kfree(slot->name);
 	kfree(slot->hotplug_slot);
 	kfree(slot);
 }
@@ -315,9 +316,13 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 	if (!slot)
 		goto error;
 
+	slot->name = kzalloc(SLOT_NAME_SIZE, GFP_KERNEL);
+	if (!slot->name)
+		goto error_slot;
+
 	slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
 	if (!slot->hotplug_slot)
-		goto error_slot;
+		goto error_name;
 
 	slot->hotplug_slot->info = &slot->info;
 
@@ -336,23 +341,21 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 	slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
 
 	acpiphp_slot->slot = slot;
-	snprintf(slot->name, sizeof(slot->name), "%u", slot->acpi_slot->sun);
+	snprintf(slot->name, SLOT_NAME_SIZE, "%u", slot->acpi_slot->sun);
 
 	retval = pci_hp_register(slot->hotplug_slot,
 					acpiphp_slot->bridge->pci_bus,
 					acpiphp_slot->device);
-	if (retval == -EBUSY)
-		goto error_hpslot;
-	if (retval) {
-		err("pci_hp_register failed with error %d\n", retval);
+	if (retval)
 		goto error_hpslot;
- 	}
 
 	info("Slot [%s] registered\n", slot->hotplug_slot->name);
 
 	return 0;
 error_hpslot:
 	kfree(slot->hotplug_slot);
+error_name:
+	kfree(slot->name);
 error_slot:
 	kfree(slot);
 error:
-- 
1.6.0.rc0.g95f8

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