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-rw-r--r--drivers/pnp/base.h2
-rw-r--r--drivers/pnp/card.c25
-rw-r--r--drivers/pnp/core.c64
-rw-r--r--drivers/pnp/driver.c10
-rw-r--r--drivers/pnp/pnpacpi/core.c5
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,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 17:31:48 +0100