linux-kernel - [PATCH 4/7] PCI hotplug: convert skeleton code to a kmalloc'ed slot name

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Message-ID: <20080806051144.GE31319@ldl.fc.hp.com>
Date:	Tue, 5 Aug 2008 23:11:44 -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 4/7] PCI hotplug: convert skeleton code 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.

Let's give future implementors a good example to copy from.

Signed-off-by: Alex Chiang <achiang@...com>
---
 drivers/pci/hotplug/pcihp_skeleton.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/hotplug/pcihp_skeleton.c b/drivers/pci/hotplug/pcihp_skeleton.c
index e3dd6cf..3e53026 100644
--- a/drivers/pci/hotplug/pcihp_skeleton.c
+++ b/drivers/pci/hotplug/pcihp_skeleton.c
@@ -41,7 +41,7 @@ struct slot {
 	u8 number;
 	struct hotplug_slot *hotplug_slot;
 	struct list_head slot_list;
-	char name[SLOT_NAME_SIZE];
+	char *name;
 };
 
 static LIST_HEAD(slot_list);
@@ -232,6 +232,7 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
 	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 	kfree(slot->hotplug_slot->info);
 	kfree(slot->hotplug_slot);
+	kfree(slot->name);
 	kfree(slot);
 }
 
@@ -265,9 +266,13 @@ static int __init init_slots(void)
 		if (!slot)
 			goto error;
 
+		slot->name = kzalloc(SLOT_NAME_SIZE, GFP_KERNEL);
+		if (!slot->name)
+			goto error_slot;
+
 		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
 		if (!hotplug_slot)
-			goto error_slot;
+			goto error_name;
 		slot->hotplug_slot = hotplug_slot;
 
 		info = kzalloc(sizeof(*info), GFP_KERNEL);
@@ -308,6 +313,8 @@ error_info:
 	kfree(info);
 error_hpslot:
 	kfree(hotplug_slot);
+error_name:
+	kfree(slot->name);
 error_slot:
 	kfree(slot);
 error:
-- 
1.6.0.rc0.g95f8

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