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authorJiang Liu <jiang.liu@huawei.com>2012-07-24 17:20:10 +0800
committerBjorn Helgaas <bhelgaas@google.com>2012-08-23 10:11:11 -0600
commit263e54b99eb8f77be9b2144c5e466e95847c888c (patch)
tree0207c1f5b91200abca363c4ad6790e7161c680b2 /drivers
parent537a77e65d2e971ff2688e285cc88283d4ce13b0 (diff)
PCI/PME: Use PCI Express Capability accessors
Use PCI Express Capability access functions to simplify PCIe PME. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/pcie/pme.c23
1 files changed, 6 insertions, 17 deletions
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 30897bf05b5..9ca0dc9ffd8 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -57,17 +57,12 @@ struct pcie_pme_service_data {
*/
void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable)
{
- int rtctl_pos;
- u16 rtctl;
-
- rtctl_pos = pci_pcie_cap(dev) + PCI_EXP_RTCTL;
-
- pci_read_config_word(dev, rtctl_pos, &rtctl);
if (enable)
- rtctl |= PCI_EXP_RTCTL_PMEIE;
+ pcie_capability_set_word(dev, PCI_EXP_RTCTL,
+ PCI_EXP_RTCTL_PMEIE);
else
- rtctl &= ~PCI_EXP_RTCTL_PMEIE;
- pci_write_config_word(dev, rtctl_pos, rtctl);
+ pcie_capability_clear_word(dev, PCI_EXP_RTCTL,
+ PCI_EXP_RTCTL_PMEIE);
}
/**
@@ -226,18 +221,15 @@ static void pcie_pme_work_fn(struct work_struct *work)
struct pcie_pme_service_data *data =
container_of(work, struct pcie_pme_service_data, work);
struct pci_dev *port = data->srv->port;
- int rtsta_pos;
u32 rtsta;
- rtsta_pos = pci_pcie_cap(port) + PCI_EXP_RTSTA;
-
spin_lock_irq(&data->lock);
for (;;) {
if (data->noirq)
break;
- pci_read_config_dword(port, rtsta_pos, &rtsta);
+ pcie_capability_read_dword(port, PCI_EXP_RTSTA, &rtsta);
if (rtsta & PCI_EXP_RTSTA_PME) {
/*
* Clear PME status of the port. If there are other
@@ -276,17 +268,14 @@ static irqreturn_t pcie_pme_irq(int irq, void *context)
{
struct pci_dev *port;
struct pcie_pme_service_data *data;
- int rtsta_pos;
u32 rtsta;
unsigned long flags;
port = ((struct pcie_device *)context)->port;
data = get_service_data((struct pcie_device *)context);
- rtsta_pos = pci_pcie_cap(port) + PCI_EXP_RTSTA;
-
spin_lock_irqsave(&data->lock, flags);
- pci_read_config_dword(port, rtsta_pos, &rtsta);
+ pcie_capability_read_dword(port, PCI_EXP_RTSTA, &rtsta);
if (!(rtsta & PCI_EXP_RTSTA_PME)) {
spin_unlock_irqrestore(&data->lock, flags);