summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/pci/pcie/pme.c35
1 files changed, 13 insertions, 22 deletions
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 80e58d25006d..fafdb165dd2e 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -40,17 +40,11 @@ static int __init pcie_pme_setup(char *str)
}
__setup("pcie_pme=", pcie_pme_setup);
-enum pme_suspend_level {
- PME_SUSPEND_NONE = 0,
- PME_SUSPEND_WAKEUP,
- PME_SUSPEND_NOIRQ,
-};
-
struct pcie_pme_service_data {
spinlock_t lock;
struct pcie_device *srv;
struct work_struct work;
- enum pme_suspend_level suspend_level;
+ bool noirq; /* If set, keep the PME interrupt disabled. */
};
/**
@@ -228,7 +222,7 @@ static void pcie_pme_work_fn(struct work_struct *work)
spin_lock_irq(&data->lock);
for (;;) {
- if (data->suspend_level != PME_SUSPEND_NONE)
+ if (data->noirq)
break;
pcie_capability_read_dword(port, PCI_EXP_RTSTA, &rtsta);
@@ -255,7 +249,7 @@ static void pcie_pme_work_fn(struct work_struct *work)
spin_lock_irq(&data->lock);
}
- if (data->suspend_level == PME_SUSPEND_NONE)
+ if (!data->noirq)
pcie_pme_interrupt_enable(port, true);
spin_unlock_irq(&data->lock);
@@ -378,7 +372,7 @@ static int pcie_pme_suspend(struct pcie_device *srv)
{
struct pcie_pme_service_data *data = get_service_data(srv);
struct pci_dev *port = srv->port;
- bool wakeup, wake_irq_enabled = false;
+ bool wakeup;
int ret;
if (device_may_wakeup(&port->dev)) {
@@ -388,19 +382,16 @@ static int pcie_pme_suspend(struct pcie_device *srv)
wakeup = pcie_pme_check_wakeup(port->subordinate);
up_read(&pci_bus_sem);
}
- spin_lock_irq(&data->lock);
if (wakeup) {
ret = enable_irq_wake(srv->irq);
- if (ret == 0) {
- data->suspend_level = PME_SUSPEND_WAKEUP;
- wake_irq_enabled = true;
- }
- }
- if (!wake_irq_enabled) {
- pcie_pme_interrupt_enable(port, false);
- pcie_clear_root_pme_status(port);
- data->suspend_level = PME_SUSPEND_NOIRQ;
+ if (!ret)
+ return 0;
}
+
+ spin_lock_irq(&data->lock);
+ pcie_pme_interrupt_enable(port, false);
+ pcie_clear_root_pme_status(port);
+ data->noirq = true;
spin_unlock_irq(&data->lock);
synchronize_irq(srv->irq);
@@ -417,15 +408,15 @@ static int pcie_pme_resume(struct pcie_device *srv)
struct pcie_pme_service_data *data = get_service_data(srv);
spin_lock_irq(&data->lock);
- if (data->suspend_level == PME_SUSPEND_NOIRQ) {
+ if (data->noirq) {
struct pci_dev *port = srv->port;
pcie_clear_root_pme_status(port);
pcie_pme_interrupt_enable(port, true);
+ data->noirq = false;
} else {
disable_irq_wake(srv->irq);
}
- data->suspend_level = PME_SUSPEND_NONE;
spin_unlock_irq(&data->lock);
return 0;