Merge branch 'pnp'

* pnp:
  PNP: Avoid leaving unregistered device objects in lists
  PNP: Convert pnp_lock into a mutex
  PNP: tty/serial/8250/8250_fintek: Use module_pnp_driver to register driver
  PNP: platform/x86/apple-gmux: Use module_pnp_driver to register driver
  PNP: net/sb1000: Use module_pnp_driver to register driver
  PNP: media/rc: Use module_pnp_driver to register driver
  PNP: ide/ide-pnp: Use module_pnp_driver to register driver
  PNP: ata/pata_isapnp: Use module_pnp_driver to register driver
  PNP: tpm/tpm_infineon: Use module_pnp_driver to register driver
  PNP: Add helper macro for pnp_register_driver boilerplate
  PNP / ACPI: Use ACPI_COMPANION_SET() during initialization

16 files changed, 89 insertions, 164 deletions

diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index b33d1f99b3a4..994f168b54a8 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -128,20 +128,8 @@ static struct pnp_driver isapnp_driver = {
 	.remove		= isapnp_remove_one,
 };
 
-static int __init isapnp_init(void)
-{
-	return pnp_register_driver(&isapnp_driver);
-}
-
-static void __exit isapnp_exit(void)
-{
-	pnp_unregister_driver(&isapnp_driver);
-}
-
+module_pnp_driver(isapnp_driver);
 MODULE_AUTHOR("Alan Cox");
 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
-
-module_init(isapnp_init);
-module_exit(isapnp_exit);
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 6d492132ad2b..29ba520ac24d 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -637,18 +637,7 @@ static struct pnp_driver tpm_inf_pnp_driver = {
 	.remove = tpm_inf_pnp_remove
 };
 
-static int __init init_inf(void)
-{
-	return pnp_register_driver(&tpm_inf_pnp_driver);
-}
-
-static void __exit cleanup_inf(void)
-{
-	pnp_unregister_driver(&tpm_inf_pnp_driver);
-}
-
-module_init(init_inf);
-module_exit(cleanup_inf);
+module_pnp_driver(tpm_inf_pnp_driver);
 
 MODULE_AUTHOR("Marcel Selhorst <tpmdd@sirrix.com>");
 MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index e5f3db831373..f5f2b62471da 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -96,17 +96,5 @@ static struct pnp_driver idepnp_driver = {
 	.remove		= idepnp_remove,
 };
 
-static int __init pnpide_init(void)
-{
-	return pnp_register_driver(&idepnp_driver);
-}
-
-static void __exit pnpide_exit(void)
-{
-	pnp_unregister_driver(&idepnp_driver);
-}
-
-module_init(pnpide_init);
-module_exit(pnpide_exit);
-
+module_pnp_driver(idepnp_driver);
 MODULE_LICENSE("GPL");
diff --git a/drivers/media/rc/ene_ir.c b/drivers/media/rc/ene_ir.c
index e80f2c6c5f1a..8d77e1c4a141 100644
--- a/drivers/media/rc/ene_ir.c
+++ b/drivers/media/rc/ene_ir.c
@@ -1195,16 +1195,6 @@ static struct pnp_driver ene_driver = {
 	.shutdown = ene_shutdown,
 };
 
-static int __init ene_init(void)
-{
-	return pnp_register_driver(&ene_driver);
-}
-
-static void ene_exit(void)
-{
-	pnp_unregister_driver(&ene_driver);
-}
-
 module_param(sample_period, int, S_IRUGO);
 MODULE_PARM_DESC(sample_period, "Hardware sample period (50 us default)");
 
@@ -1226,5 +1216,4 @@ MODULE_DESCRIPTION
 MODULE_AUTHOR("Maxim Levitsky");
 MODULE_LICENSE("GPL");
 
-module_init(ene_init);
-module_exit(ene_exit);
+module_pnp_driver(ene_driver);
diff --git a/drivers/media/rc/fintek-cir.c b/drivers/media/rc/fintek-cir.c
index b5167573240e..5c63c2ec6183 100644
--- a/drivers/media/rc/fintek-cir.c
+++ b/drivers/media/rc/fintek-cir.c
@@ -684,16 +684,6 @@ static struct pnp_driver fintek_driver = {
 	.shutdown	= fintek_shutdown,
 };
 
-static int __init fintek_init(void)
-{
-	return pnp_register_driver(&fintek_driver);
-}
-
-static void __exit fintek_exit(void)
-{
-	pnp_unregister_driver(&fintek_driver);
-}
-
 module_param(debug, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Enable debugging output");
 
@@ -703,5 +693,4 @@ MODULE_DESCRIPTION(FINTEK_DESCRIPTION " driver");
 MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
 MODULE_LICENSE("GPL");
 
-module_init(fintek_init);
-module_exit(fintek_exit);
+module_pnp_driver(fintek_driver);
diff --git a/drivers/media/rc/ite-cir.c b/drivers/media/rc/ite-cir.c
index 56abf9120cc2..0f301903aa6f 100644
--- a/drivers/media/rc/ite-cir.c
+++ b/drivers/media/rc/ite-cir.c
@@ -1708,21 +1708,10 @@ static struct pnp_driver ite_driver = {
 	.shutdown	= ite_shutdown,
 };
 
-static int __init ite_init(void)
-{
-	return pnp_register_driver(&ite_driver);
-}
-
-static void __exit ite_exit(void)
-{
-	pnp_unregister_driver(&ite_driver);
-}
-
 MODULE_DEVICE_TABLE(pnp, ite_ids);
 MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
 
 MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
 MODULE_LICENSE("GPL");
 
-module_init(ite_init);
-module_exit(ite_exit);
+module_pnp_driver(ite_driver);
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index 9c2c8635ff33..85af7a869167 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -1219,16 +1219,6 @@ static struct pnp_driver nvt_driver = {
 	.shutdown	= nvt_shutdown,
 };
 
-static int __init nvt_init(void)
-{
-	return pnp_register_driver(&nvt_driver);
-}
-
-static void __exit nvt_exit(void)
-{
-	pnp_unregister_driver(&nvt_driver);
-}
-
 module_param(debug, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Enable debugging output");
 
@@ -1238,5 +1228,4 @@ MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver");
 MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
 MODULE_LICENSE("GPL");
 
-module_init(nvt_init);
-module_exit(nvt_exit);
+module_pnp_driver(nvt_driver);
diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c
index 66c2f1a01963..aad0b59d41e3 100644
--- a/drivers/net/sb1000.c
+++ b/drivers/net/sb1000.c
@@ -1175,17 +1175,4 @@ MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
 MODULE_DESCRIPTION("General Instruments SB1000 driver");
 MODULE_LICENSE("GPL");
 
-static int __init
-sb1000_init(void)
-{
-	return pnp_register_driver(&sb1000_driver);
-}
-
-static void __exit
-sb1000_exit(void)
-{
-	pnp_unregister_driver(&sb1000_driver);
-}
-
-module_init(sb1000_init);
-module_exit(sb1000_exit);
+module_pnp_driver(sb1000_driver);
diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index b9429fbf1cd8..66d6d22c239c 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -624,19 +624,7 @@ static struct pnp_driver gmux_pnp_driver = {
 	},
 };
 
-static int __init apple_gmux_init(void)
-{
-	return pnp_register_driver(&gmux_pnp_driver);
-}
-
-static void __exit apple_gmux_exit(void)
-{
-	pnp_unregister_driver(&gmux_pnp_driver);
-}
-
-module_init(apple_gmux_init);
-module_exit(apple_gmux_exit);
-
+module_pnp_driver(gmux_pnp_driver);
 MODULE_AUTHOR("Seth Forshee <seth.forshee@canonical.com>");
 MODULE_DESCRIPTION("Apple Gmux Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index c8873b0ca551..3151fd164614 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -3,7 +3,7 @@
  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
  */
 
-extern spinlock_t pnp_lock;
+extern struct mutex pnp_lock;
 extern const struct attribute_group *pnp_dev_groups[];
 void *pnp_alloc(long size);
 
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
index 874c236ac1a7..31ad9fc3f701 100644
--- a/drivers/pnp/card.c
+++ b/drivers/pnp/card.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/ctype.h>
 #include <linux/slab.h>
 #include <linux/pnp.h>
@@ -244,10 +245,10 @@ int pnp_add_card(struct pnp_card *card)
 	}
 
 	pnp_interface_attach_card(card);
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	list_add_tail(&card->global_list, &pnp_cards);
 	list_add_tail(&card->protocol_list, &card->protocol->cards);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 
 	/* we wait until now to add devices in order to ensure the drivers
 	 * will be able to use all of the related devices on the card
@@ -276,10 +277,10 @@ void pnp_remove_card(struct pnp_card *card)
 	struct list_head *pos, *temp;
 
 	device_unregister(&card->dev);
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	list_del(&card->global_list);
 	list_del(&card->protocol_list);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	list_for_each_safe(pos, temp, &card->devices) {
 		struct pnp_dev *dev = card_to_pnp_dev(pos);
 		pnp_remove_card_device(dev);
@@ -297,10 +298,10 @@ int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
 	dev->card_link = NULL;
 	dev_set_name(&dev->dev, "%02x:%02x.%02x",
 		     dev->protocol->number, card->number, dev->number);
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	dev->card = card;
 	list_add_tail(&dev->card_list, &card->devices);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	return 0;
 }
 
@@ -310,10 +311,10 @@ int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
  */
 void pnp_remove_card_device(struct pnp_dev *dev)
 {
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	dev->card = NULL;
 	list_del(&dev->card_list);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	__pnp_remove_device(dev);
 }
 
@@ -426,9 +427,9 @@ int pnp_register_card_driver(struct pnp_card_driver *drv)
 	if (error < 0)
 		return error;
 
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	list_add_tail(&drv->global_list, &pnp_card_drivers);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 
 	list_for_each_safe(pos, temp, &pnp_cards) {
 		struct pnp_card *card =
@@ -444,9 +445,9 @@ int pnp_register_card_driver(struct pnp_card_driver *drv)
  */
 void pnp_unregister_card_driver(struct pnp_card_driver *drv)
 {
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	list_del(&drv->global_list);
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	pnp_unregister_driver(&drv->link);
 }
 
diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c
index cb6ce42f8e77..b54620e53830 100644
--- a/drivers/pnp/core.c
+++ b/drivers/pnp/core.c
@@ -9,6 +9,7 @@
 #include <linux/list.h>
 #include <linux/device.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/slab.h>
@@ -19,7 +20,7 @@
 
 static LIST_HEAD(pnp_protocols);
 LIST_HEAD(pnp_global);
-DEFINE_SPINLOCK(pnp_lock);
+DEFINE_MUTEX(pnp_lock);
 
 /*
  * ACPI or PNPBIOS should tell us about all platform devices, so we can
@@ -41,6 +42,13 @@ void *pnp_alloc(long size)
 	return result;
 }
 
+static void pnp_remove_protocol(struct pnp_protocol *protocol)
+{
+	mutex_lock(&pnp_lock);
+	list_del(&protocol->protocol_list);
+	mutex_unlock(&pnp_lock);
+}
+
 /**
  * pnp_protocol_register - adds a pnp protocol to the pnp layer
  * @protocol: pointer to the corresponding pnp_protocol structure
@@ -49,13 +57,14 @@ void *pnp_alloc(long size)
  */
 int pnp_register_protocol(struct pnp_protocol *protocol)
 {
-	int nodenum;
 	struct list_head *pos;
+	int nodenum, ret;
 
 	INIT_LIST_HEAD(&protocol->devices);
 	INIT_LIST_HEAD(&protocol->cards);
 	nodenum = 0;
-	spin_lock(&pnp_lock);
+
+	mutex_lock(&pnp_lock);
 
 	/* assign the lowest unused number */
 	list_for_each(pos, &pnp_protocols) {
@@ -66,12 +75,18 @@ int pnp_register_protocol(struct pnp_protocol *protocol)
 		}
 	}
 
-	list_add_tail(&protocol->protocol_list, &pnp_protocols);
-	spin_unlock(&pnp_lock);
-
 	protocol->number = nodenum;
 	dev_set_name(&protocol->dev, "pnp%d", nodenum);
-	return device_register(&protocol->dev);
+
+	list_add_tail(&protocol->protocol_list, &pnp_protocols);
+
+	mutex_unlock(&pnp_lock);
+
+	ret = device_register(&protocol->dev);
+	if (ret)
+		pnp_remove_protocol(protocol);
+
+	return ret;
 }
 
 /**
@@ -80,9 +95,7 @@ int pnp_register_protocol(struct pnp_protocol *protocol)
  */
 void pnp_unregister_protocol(struct pnp_protocol *protocol)
 {
-	spin_lock(&pnp_lock);
-	list_del(&protocol->protocol_list);
-	spin_unlock(&pnp_lock);
+	pnp_remove_protocol(protocol);
 	device_unregister(&protocol->dev);
 }
 
@@ -157,18 +170,36 @@ struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
 	return dev;
 }
 
+static void pnp_delist_device(struct pnp_dev *dev)
+{
+	mutex_lock(&pnp_lock);
+	list_del(&dev->global_list);
+	list_del(&dev->protocol_list);
+	mutex_unlock(&pnp_lock);
+}
+
 int __pnp_add_device(struct pnp_dev *dev)
 {
+	int ret;
+
 	pnp_fixup_device(dev);
 	dev->status = PNP_READY;
-	spin_lock(&pnp_lock);
+
+	mutex_lock(&pnp_lock);
+
 	list_add_tail(&dev->global_list, &pnp_global);
 	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
-	spin_unlock(&pnp_lock);
-	if (dev->protocol->can_wakeup)
+
+	mutex_unlock(&pnp_lock);
+
+	ret = device_register(&dev->dev);
+	if (ret)
+		pnp_delist_device(dev);
+	else if (dev->protocol->can_wakeup)
 		device_set_wakeup_capable(&dev->dev,
 				dev->protocol->can_wakeup(dev));
-	return device_register(&dev->dev);
+
+	return ret;
 }
 
 /*
@@ -203,10 +234,7 @@ int pnp_add_device(struct pnp_dev *dev)
 
 void __pnp_remove_device(struct pnp_dev *dev)
 {
-	spin_lock(&pnp_lock);
-	list_del(&dev->global_list);
-	list_del(&dev->protocol_list);
-	spin_unlock(&pnp_lock);
+	pnp_delist_device(dev);
 	device_unregister(&dev->dev);
 }
 
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 4e57d3370368..153a493b5413 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -58,22 +58,22 @@ static const struct pnp_device_id *match_device(struct pnp_driver *drv,
 
 int pnp_device_attach(struct pnp_dev *pnp_dev)
 {
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	if (pnp_dev->status != PNP_READY) {
-		spin_unlock(&pnp_lock);
+		mutex_unlock(&pnp_lock);
 		return -EBUSY;
 	}
 	pnp_dev->status = PNP_ATTACHED;
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	return 0;
 }
 
 void pnp_device_detach(struct pnp_dev *pnp_dev)
 {
-	spin_lock(&pnp_lock);
+	mutex_lock(&pnp_lock);
 	if (pnp_dev->status == PNP_ATTACHED)
 		pnp_dev->status = PNP_READY;
-	spin_unlock(&pnp_lock);
+	mutex_unlock(&pnp_lock);
 	pnp_disable_dev(pnp_dev);
 }
 
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index d2b780aade89..5153d1d69aee 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -248,6 +248,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 	if (!dev)
 		return -ENOMEM;
 
+	ACPI_COMPANION_SET(&dev->dev, device);
 	dev->data = device;
 	/* .enabled means the device can decode the resources */
 	dev->active = device->status.enabled;
@@ -290,11 +291,9 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 		return error;
 	}
 
-	error = acpi_bind_one(&dev->dev, device);
-
 	num++;
 
-	return error;
+	return 0;
 }
 
 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index 1e6899bc9429..5815e81b5fc6 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -234,18 +234,7 @@ static struct pnp_driver fintek_8250_driver = {
 	.id_table	= fintek_dev_table,
 };
 
-static int fintek_8250_init(void)
-{
-	return pnp_register_driver(&fintek_8250_driver);
-}
-module_init(fintek_8250_init);
-
-static void fintek_8250_exit(void)
-{
-	pnp_unregister_driver(&fintek_8250_driver);
-}
-module_exit(fintek_8250_exit);
-
+module_pnp_driver(fintek_8250_driver);
 MODULE_DESCRIPTION("Fintek F812164 module");
 MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
 MODULE_LICENSE("GPL");
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 6512e9cbc6d5..5df733b8f704 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -510,4 +510,16 @@ static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
 
 #endif /* CONFIG_PNP */
 
+/**
+ * module_pnp_driver() - Helper macro for registering a PnP driver
+ * @__pnp_driver: pnp_driver struct
+ *
+ * Helper macro for PnP drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_pnp_driver(__pnp_driver) \
+	module_driver(__pnp_driver, pnp_register_driver, \
+				    pnp_unregister_driver)
+
 #endif /* _LINUX_PNP_H */