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path: root/drivers/misc/tifm_7xx1.c
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Diffstat (limited to 'drivers/misc/tifm_7xx1.c')
-rw-r--r--drivers/misc/tifm_7xx1.c89
1 files changed, 34 insertions, 55 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index fd7b8dadc82..e5655fef42d 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 09:52:00 +0000