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-rw-r--r--drivers/misc/tifm_7xx1.c89
-rw-r--r--drivers/misc/tifm_core.c51
-rw-r--r--include/linux/tifm.h8
3 files changed, 72 insertions, 76 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index fd7b8dadc821..e5655fef42d7 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -28,7 +28,7 @@ static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
spin_lock_irqsave(&fm->lock, flags);
fm->socket_change_set |= 1 << sock->socket_id;
- wake_up_all(&fm->change_set_notify);
+ tifm_queue_work(&fm->media_switcher);
spin_unlock_irqrestore(&fm->lock, flags);
}
@@ -64,10 +64,12 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
}
writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
- if (!fm->socket_change_set)
+ if (fm->finish_me)
+ complete_all(fm->finish_me);
+ else if (!fm->socket_change_set)
writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
else
- wake_up_all(&fm->change_set_notify);
+ tifm_queue_work(&fm->media_switcher);
spin_unlock(&fm->lock);
return IRQ_HANDLED;
@@ -125,37 +127,29 @@ tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
return base_addr + ((sock_num + 1) << 10);
}
-static int tifm_7xx1_switch_media(void *data)
+static void tifm_7xx1_switch_media(struct work_struct *work)
{
- struct tifm_adapter *fm = data;
+ struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
+ media_switcher);
unsigned long flags;
unsigned char media_id;
char *card_name = "xx";
- int cnt, rc;
+ int cnt;
struct tifm_dev *sock;
unsigned int socket_change_set;
- while (1) {
- rc = wait_event_interruptible(fm->change_set_notify,
- fm->socket_change_set);
- if (rc == -ERESTARTSYS)
- try_to_freeze();
-
- spin_lock_irqsave(&fm->lock, flags);
- socket_change_set = fm->socket_change_set;
- fm->socket_change_set = 0;
+ spin_lock_irqsave(&fm->lock, flags);
+ socket_change_set = fm->socket_change_set;
+ fm->socket_change_set = 0;
- dev_dbg(fm->dev, "checking media set %x\n",
- socket_change_set);
+ dev_dbg(fm->dev, "checking media set %x\n",
+ socket_change_set);
- if (kthread_should_stop())
- socket_change_set = (1 << fm->num_sockets) - 1;
+ if (!socket_change_set) {
spin_unlock_irqrestore(&fm->lock, flags);
+ return;
+ }
- if (!socket_change_set)
- continue;
-
- spin_lock_irqsave(&fm->lock, flags);
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
if (!(socket_change_set & (1 << cnt)))
continue;
@@ -172,8 +166,6 @@ static int tifm_7xx1_switch_media(void *data)
tifm_7xx1_sock_addr(fm->addr, cnt)
+ SOCK_CONTROL);
}
- if (kthread_should_stop())
- continue;
spin_unlock_irqrestore(&fm->lock, flags);
media_id = tifm_7xx1_toggle_sock_power(
@@ -222,30 +214,16 @@ static int tifm_7xx1_switch_media(void *data)
}
}
- if (!kthread_should_stop()) {
- writel(TIFM_IRQ_FIFOMASK(socket_change_set)
- | TIFM_IRQ_CARDMASK(socket_change_set),
- fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
- writel(TIFM_IRQ_FIFOMASK(socket_change_set)
- | TIFM_IRQ_CARDMASK(socket_change_set),
- fm->addr + FM_SET_INTERRUPT_ENABLE);
- writel(TIFM_IRQ_ENABLE,
- fm->addr + FM_SET_INTERRUPT_ENABLE);
- spin_unlock_irqrestore(&fm->lock, flags);
- } else {
- for (cnt = 0; cnt < fm->num_sockets; cnt++) {
- if (fm->sockets[cnt])
- fm->socket_change_set |= 1 << cnt;
- }
- if (!fm->socket_change_set) {
- spin_unlock_irqrestore(&fm->lock, flags);
- return 0;
- } else {
- spin_unlock_irqrestore(&fm->lock, flags);
- }
- }
- }
- return 0;
+ writel(TIFM_IRQ_FIFOMASK(socket_change_set)
+ | TIFM_IRQ_CARDMASK(socket_change_set),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+
+ writel(TIFM_IRQ_FIFOMASK(socket_change_set)
+ | TIFM_IRQ_CARDMASK(socket_change_set),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_unlock_irqrestore(&fm->lock, flags);
}
#ifdef CONFIG_PM
@@ -267,6 +245,7 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
int cnt, rc;
unsigned long flags;
unsigned char new_ids[fm->num_sockets];
+ DECLARE_COMPLETION_ONSTACK(finish_resume);
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
@@ -299,12 +278,14 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
return 0;
} else {
fm->socket_change_set = 0;
+ fm->finish_me = &finish_resume;
spin_unlock_irqrestore(&fm->lock, flags);
}
- wait_event_timeout(fm->change_set_notify, fm->socket_change_set, HZ);
+ wait_for_completion_timeout(&finish_resume, HZ);
spin_lock_irqsave(&fm->lock, flags);
+ fm->finish_me = NULL;
writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
| TIFM_IRQ_CARDMASK(fm->socket_change_set),
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
@@ -365,6 +346,7 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
if (!fm->sockets)
goto err_out_free;
+ INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
fm->eject = tifm_7xx1_eject;
pci_set_drvdata(dev, fm);
@@ -377,15 +359,14 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
if (rc)
goto err_out_unmap;
- init_waitqueue_head(&fm->change_set_notify);
- rc = tifm_add_adapter(fm, tifm_7xx1_switch_media);
+ rc = tifm_add_adapter(fm);
if (rc)
goto err_out_irq;
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
fm->addr + FM_SET_INTERRUPT_ENABLE);
- wake_up_process(fm->media_switcher);
+
return 0;
err_out_irq:
@@ -417,8 +398,6 @@ static void tifm_7xx1_remove(struct pci_dev *dev)
fm->socket_change_set = (1 << fm->num_sockets) - 1;
spin_unlock_irqrestore(&fm->lock, flags);
- kthread_stop(fm->media_switcher);
-
tifm_remove_adapter(fm);
pci_set_drvdata(dev, NULL);
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index 6b2c447dc8ee..ef8a97b819dd 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -16,6 +16,7 @@
#define DRIVER_NAME "tifm_core"
#define DRIVER_VERSION "0.8"
+static struct workqueue_struct *workqueue;
static DEFINE_IDR(tifm_adapter_idr);
static DEFINE_SPINLOCK(tifm_adapter_lock);
@@ -184,8 +185,7 @@ void tifm_free_adapter(struct tifm_adapter *fm)
}
EXPORT_SYMBOL(tifm_free_adapter);
-int tifm_add_adapter(struct tifm_adapter *fm,
- int (*mediathreadfn)(void *data))
+int tifm_add_adapter(struct tifm_adapter *fm)
{
int rc;
@@ -197,16 +197,13 @@ int tifm_add_adapter(struct tifm_adapter *fm,
spin_unlock(&tifm_adapter_lock);
if (!rc) {
snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
- fm->media_switcher = kthread_create(mediathreadfn,
- fm, "tifm/%u", fm->id);
+ rc = class_device_add(&fm->cdev);
- if (!IS_ERR(fm->media_switcher))
- return class_device_add(&fm->cdev);
-
- spin_lock(&tifm_adapter_lock);
- idr_remove(&tifm_adapter_idr, fm->id);
- spin_unlock(&tifm_adapter_lock);
- rc = -ENOMEM;
+ if (rc) {
+ spin_lock(&tifm_adapter_lock);
+ idr_remove(&tifm_adapter_idr, fm->id);
+ spin_unlock(&tifm_adapter_lock);
+ }
}
return rc;
}
@@ -214,6 +211,7 @@ EXPORT_SYMBOL(tifm_add_adapter);
void tifm_remove_adapter(struct tifm_adapter *fm)
{
+ flush_workqueue(workqueue);
class_device_del(&fm->cdev);
spin_lock(&tifm_adapter_lock);
@@ -267,6 +265,12 @@ void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
}
EXPORT_SYMBOL(tifm_unmap_sg);
+void tifm_queue_work(struct work_struct *work)
+{
+ queue_work(workqueue, work);
+}
+EXPORT_SYMBOL(tifm_queue_work);
+
int tifm_register_driver(struct tifm_driver *drv)
{
drv->driver.bus = &tifm_bus_type;
@@ -283,13 +287,25 @@ EXPORT_SYMBOL(tifm_unregister_driver);
static int __init tifm_init(void)
{
- int rc = bus_register(&tifm_bus_type);
+ int rc;
- if (!rc) {
- rc = class_register(&tifm_adapter_class);
- if (rc)
- bus_unregister(&tifm_bus_type);
- }
+ workqueue = create_freezeable_workqueue("tifm");
+ if (!workqueue)
+ return -ENOMEM;
+
+ rc = bus_register(&tifm_bus_type);
+
+ if (rc)
+ goto err_out_wq;
+
+ rc = class_register(&tifm_adapter_class);
+ if (!rc)
+ return 0;
+
+ bus_unregister(&tifm_bus_type);
+
+err_out_wq:
+ destroy_workqueue(workqueue);
return rc;
}
@@ -298,6 +314,7 @@ static void __exit tifm_exit(void)
{
class_unregister(&tifm_adapter_class);
bus_unregister(&tifm_bus_type);
+ destroy_workqueue(workqueue);
}
subsys_initcall(tifm_init);
diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index 57b2653494cf..d9de79275c21 100644
--- a/include/linux/tifm.h
+++ b/include/linux/tifm.h
@@ -111,11 +111,11 @@ struct tifm_adapter {
spinlock_t lock;
unsigned int irq_status;
unsigned int socket_change_set;
- wait_queue_head_t change_set_notify;
unsigned int id;
unsigned int num_sockets;
+ struct completion *finish_me;
struct tifm_dev **sockets;
- struct task_struct *media_switcher;
+ struct work_struct media_switcher;
struct class_device cdev;
struct device *dev;
@@ -125,7 +125,7 @@ struct tifm_adapter {
struct tifm_adapter *tifm_alloc_adapter(void);
void tifm_free_device(struct device *dev);
void tifm_free_adapter(struct tifm_adapter *fm);
-int tifm_add_adapter(struct tifm_adapter *fm, int (*mediathreadfn)(void *data));
+int tifm_add_adapter(struct tifm_adapter *fm);
void tifm_remove_adapter(struct tifm_adapter *fm);
struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm);
int tifm_register_driver(struct tifm_driver *drv);
@@ -135,7 +135,7 @@ int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
int direction);
void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
int direction);
-
+void tifm_queue_work(struct work_struct *work);
static inline void *tifm_get_drvdata(struct tifm_dev *dev)
{
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