diff options
Diffstat (limited to 'drivers/pnp')
| -rw-r--r-- | drivers/pnp/base.h | 2 | ||||
| -rw-r--r-- | drivers/pnp/card.c | 25 | ||||
| -rw-r--r-- | drivers/pnp/core.c | 64 | ||||
| -rw-r--r-- | drivers/pnp/driver.c | 10 | ||||
| -rw-r--r-- | drivers/pnp/pnpacpi/core.c | 5 |
5 files changed, 67 insertions, 39 deletions
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, |