Merge tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Host bridge hotplug
    - Protect acpi_pci_drivers and acpi_pci_roots (Taku Izumi)
    - Clear host bridge resource info to avoid issue when releasing
      (Yinghai Lu)
    - Notify acpi_pci_drivers when hot-plugging host bridges (Jiang Liu)
    - Use standard list ops for acpi_pci_drivers (Jiang Liu)

  Device hotplug
    - Use pci_get_domain_bus_and_slot() to close hotplug races (Jiang
      Liu)
    - Remove fakephp driver (Bjorn Helgaas)
    - Fix VGA ref count in hotplug remove path (Yinghai Lu)
    - Allow acpiphp to handle PCIe ports without native hotplug (Jiang
      Liu)
    - Implement resume regardless of pciehp_force param (Oliver Neukum)
    - Make pci_fixup_irqs() work after init (Thierry Reding)

  Miscellaneous
    - Add pci_pcie_type(dev) and remove pci_dev.pcie_type (Yijing Wang)
    - Factor out PCI Express Capability accessors (Jiang Liu)
    - Add pcibios_window_alignment() so powerpc EEH can use generic
      resource assignment (Gavin Shan)
    - Make pci_error_handlers const (Stephen Hemminger)
    - Cleanup drivers/pci/remove.c (Bjorn Helgaas)
    - Improve Vendor-Specific Extended Capability support (Bjorn
      Helgaas)
    - Use standard list ops for bus->devices (Bjorn Helgaas)
    - Avoid kmalloc in pci_get_subsys() and pci_get_class() (Feng Tang)
    - Reassign invalid bus number ranges (Intel DP43BF workaround)
      (Yinghai Lu)"

* tag 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (102 commits)
  PCI: acpiphp: Handle PCIe ports without native hotplug capability
  PCI/ACPI: Use acpi_driver_data() rather than searching acpi_pci_roots
  PCI/ACPI: Protect acpi_pci_roots list with mutex
  PCI/ACPI: Use acpi_pci_root info rather than looking it up again
  PCI/ACPI: Pass acpi_pci_root to acpi_pci_drivers' add/remove interface
  PCI/ACPI: Protect acpi_pci_drivers list with mutex
  PCI/ACPI: Notify acpi_pci_drivers when hot-plugging PCI root bridges
  PCI/ACPI: Use normal list for struct acpi_pci_driver
  PCI/ACPI: Use DEVICE_ACPI_HANDLE rather than searching acpi_pci_roots
  PCI: Fix default vga ref_count
  ia64/PCI: Clear host bridge aperture struct resource
  x86/PCI: Clear host bridge aperture struct resource
  PCI: Stop all children first, before removing all children
  Revert "PCI: Use hotplug-safe pci_get_domain_bus_and_slot()"
  PCI: Provide a default pcibios_update_irq()
  PCI: Discard __init annotations for pci_fixup_irqs() and related functions
  PCI: Use correct type when freeing bus resource list
  PCI: Check P2P bridge for invalid secondary/subordinate range
  PCI: Convert "new_id"/"remove_id" into generic pci_bus driver attributes
  xen-pcifront: Use hotplug-safe pci_get_domain_bus_and_slot()
  ...

30 files changed, 94 insertions, 209 deletions

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 1bf5bbf..55a2e37 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -149,7 +149,7 @@ static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 	data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 	pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 	/* clear error status */
-	pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
+	pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 			PCI_EXP_DEVSTA_NFED |
 			PCI_EXP_DEVSTA_FED |
 			PCI_EXP_DEVSTA_CED |
@@ -2685,7 +2685,7 @@ static void atl1c_io_resume(struct pci_dev *pdev)
 	netif_device_attach(netdev);
 }
 
-static struct pci_error_handlers atl1c_err_handler = {
+static const struct pci_error_handlers atl1c_err_handler = {
 	.error_detected = atl1c_io_error_detected,
 	.slot_reset = atl1c_io_slot_reset,
 	.resume = atl1c_io_resume,
diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
index a98acc8..e213da2 100644
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -2489,7 +2489,7 @@ static void atl1e_io_resume(struct pci_dev *pdev)
 	netif_device_attach(netdev);
 }
 
-static struct pci_error_handlers atl1e_err_handler = {
+static const struct pci_error_handlers atl1e_err_handler = {
 	.error_detected = atl1e_io_error_detected,
 	.slot_reset = atl1e_io_slot_reset,
 	.resume = atl1e_io_resume,
diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index e48312f..d431070 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -8742,7 +8742,7 @@ static void bnx2_io_resume(struct pci_dev *pdev)
 	rtnl_unlock();
 }
 
-static struct pci_error_handlers bnx2_err_handler = {
+static const struct pci_error_handlers bnx2_err_handler = {
 	.error_detected	= bnx2_io_error_detected,
 	.slot_reset	= bnx2_io_slot_reset,
 	.resume		= bnx2_io_resume,
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 0875ecf..e11485c 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -1162,14 +1162,9 @@ static int bnx2x_send_final_clnup(struct bnx2x *bp, u8 clnup_func,
 
 static u8 bnx2x_is_pcie_pending(struct pci_dev *dev)
 {
-	int pos;
 	u16 status;
 
-	pos = pci_pcie_cap(dev);
-	if (!pos)
-		return false;
-
-	pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, &status);
+	pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &status);
 	return status & PCI_EXP_DEVSTA_TRPND;
 }
 
@@ -6135,8 +6130,7 @@ static void bnx2x_init_pxp(struct bnx2x *bp)
 	u16 devctl;
 	int r_order, w_order;
 
-	pci_read_config_word(bp->pdev,
-			     pci_pcie_cap(bp->pdev) + PCI_EXP_DEVCTL, &devctl);
+	pcie_capability_read_word(bp->pdev, PCI_EXP_DEVCTL, &devctl);
 	DP(NETIF_MSG_HW, "read 0x%x from devctl\n", devctl);
 	w_order = ((devctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
 	if (bp->mrrs == -1)
@@ -9380,7 +9374,7 @@ static int __devinit bnx2x_prev_mark_path(struct bnx2x *bp)
 
 static int __devinit bnx2x_do_flr(struct bnx2x *bp)
 {
-	int i, pos;
+	int i;
 	u16 status;
 	struct pci_dev *dev = bp->pdev;
 
@@ -9397,16 +9391,12 @@ static int __devinit bnx2x_do_flr(struct bnx2x *bp)
 		return -EINVAL;
 	}
 
-	pos = pci_pcie_cap(dev);
-	if (!pos)
-		return -ENOTTY;
-
 	/* Wait for Transaction Pending bit clean */
 	for (i = 0; i < 4; i++) {
 		if (i)
 			msleep((1 << (i - 1)) * 100);
 
-		pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, &status);
+		pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &status);
 		if (!(status & PCI_EXP_DEVSTA_TRPND))
 			goto clear;
 	}
@@ -12167,7 +12157,7 @@ static void bnx2x_io_resume(struct pci_dev *pdev)
 	rtnl_unlock();
 }
 
-static struct pci_error_handlers bnx2x_err_handler = {
+static const struct pci_error_handlers bnx2x_err_handler = {
 	.error_detected = bnx2x_io_error_detected,
 	.slot_reset     = bnx2x_io_slot_reset,
 	.resume         = bnx2x_io_resume,
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index bf906c5..388d322 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -3653,17 +3653,9 @@ static int tg3_power_down_prepare(struct tg3 *tp)
 	tg3_enable_register_access(tp);
 
 	/* Restore the CLKREQ setting. */
-	if (tg3_flag(tp, CLKREQ_BUG)) {
-		u16 lnkctl;
-
-		pci_read_config_word(tp->pdev,
-				     pci_pcie_cap(tp->pdev) + PCI_EXP_LNKCTL,
-				     &lnkctl);
-		lnkctl |= PCI_EXP_LNKCTL_CLKREQ_EN;
-		pci_write_config_word(tp->pdev,
-				      pci_pcie_cap(tp->pdev) + PCI_EXP_LNKCTL,
-				      lnkctl);
-	}
+	if (tg3_flag(tp, CLKREQ_BUG))
+		pcie_capability_set_word(tp->pdev, PCI_EXP_LNKCTL,
+					 PCI_EXP_LNKCTL_CLKREQ_EN);
 
 	misc_host_ctrl = tr32(TG3PCI_MISC_HOST_CTRL);
 	tw32(TG3PCI_MISC_HOST_CTRL,
@@ -4434,20 +4426,13 @@ relink:
 
 	/* Prevent send BD corruption. */
 	if (tg3_flag(tp, CLKREQ_BUG)) {
-		u16 oldlnkctl, newlnkctl;
-
-		pci_read_config_word(tp->pdev,
-				     pci_pcie_cap(tp->pdev) + PCI_EXP_LNKCTL,
-				     &oldlnkctl);
 		if (tp->link_config.active_speed == SPEED_100 ||
 		    tp->link_config.active_speed == SPEED_10)
-			newlnkctl = oldlnkctl & ~PCI_EXP_LNKCTL_CLKREQ_EN;
+			pcie_capability_clear_word(tp->pdev, PCI_EXP_LNKCTL,
+						   PCI_EXP_LNKCTL_CLKREQ_EN);
 		else
-			newlnkctl = oldlnkctl | PCI_EXP_LNKCTL_CLKREQ_EN;
-		if (newlnkctl != oldlnkctl)
-			pci_write_config_word(tp->pdev,
-					      pci_pcie_cap(tp->pdev) +
-					      PCI_EXP_LNKCTL, newlnkctl);
+			pcie_capability_set_word(tp->pdev, PCI_EXP_LNKCTL,
+						 PCI_EXP_LNKCTL_CLKREQ_EN);
 	}
 
 	if (current_link_up != netif_carrier_ok(tp->dev)) {
@@ -8054,7 +8039,7 @@ static int tg3_chip_reset(struct tg3 *tp)
 
 	udelay(120);
 
-	if (tg3_flag(tp, PCI_EXPRESS) && pci_pcie_cap(tp->pdev)) {
+	if (tg3_flag(tp, PCI_EXPRESS) && pci_is_pcie(tp->pdev)) {
 		u16 val16;
 
 		if (tp->pci_chip_rev_id == CHIPREV_ID_5750_A0) {
@@ -8071,24 +8056,17 @@ static int tg3_chip_reset(struct tg3 *tp)
 		}
 
 		/* Clear the "no snoop" and "relaxed ordering" bits. */
-		pci_read_config_word(tp->pdev,
-				     pci_pcie_cap(tp->pdev) + PCI_EXP_DEVCTL,
-				     &val16);
-		val16 &= ~(PCI_EXP_DEVCTL_RELAX_EN |
-			   PCI_EXP_DEVCTL_NOSNOOP_EN);
+		val16 = PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN;
 		/*
 		 * Older PCIe devices only support the 128 byte
 		 * MPS setting.  Enforce the restriction.
 		 */
 		if (!tg3_flag(tp, CPMU_PRESENT))
-			val16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
-		pci_write_config_word(tp->pdev,
-				      pci_pcie_cap(tp->pdev) + PCI_EXP_DEVCTL,
-				      val16);
+			val16 |= PCI_EXP_DEVCTL_PAYLOAD;
+		pcie_capability_clear_word(tp->pdev, PCI_EXP_DEVCTL, val16);
 
 		/* Clear error status */
-		pci_write_config_word(tp->pdev,
-				      pci_pcie_cap(tp->pdev) + PCI_EXP_DEVSTA,
+		pcie_capability_write_word(tp->pdev, PCI_EXP_DEVSTA,
 				      PCI_EXP_DEVSTA_CED |
 				      PCI_EXP_DEVSTA_NFED |
 				      PCI_EXP_DEVSTA_FED |
@@ -14565,9 +14543,7 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 
 		tg3_flag_set(tp, PCI_EXPRESS);
 
-		pci_read_config_word(tp->pdev,
-				     pci_pcie_cap(tp->pdev) + PCI_EXP_LNKCTL,
-				     &lnkctl);
+		pcie_capability_read_word(tp->pdev, PCI_EXP_LNKCTL, &lnkctl);
 		if (lnkctl & PCI_EXP_LNKCTL_CLKREQ_EN) {
 			if (GET_ASIC_REV(tp->pci_chip_rev_id) ==
 			    ASIC_REV_5906) {
@@ -16397,7 +16373,7 @@ done:
 	rtnl_unlock();
 }
 
-static struct pci_error_handlers tg3_err_handler = {
+static const struct pci_error_handlers tg3_err_handler = {
 	.error_detected	= tg3_io_error_detected,
 	.slot_reset	= tg3_io_slot_reset,
 	.resume		= tg3_io_resume
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 6505070..875bbb9 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -3036,7 +3036,7 @@ static void t3_io_resume(struct pci_dev *pdev)
 	t3_resume_ports(adapter);
 }
 
-static struct pci_error_handlers t3_err_handler = {
+static const struct pci_error_handlers t3_err_handler = {
 	.error_detected = t3_io_error_detected,
 	.slot_reset = t3_io_slot_reset,
 	.resume = t3_io_resume,
diff --git a/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c b/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
index bff8a3c..aef45d3 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
@@ -3289,22 +3289,18 @@ static void config_pcie(struct adapter *adap)
 	unsigned int log2_width, pldsize;
 	unsigned int fst_trn_rx, fst_trn_tx, acklat, rpllmt;
 
-	pci_read_config_word(adap->pdev,
-			     adap->pdev->pcie_cap + PCI_EXP_DEVCTL,
-			     &val);
+	pcie_capability_read_word(adap->pdev, PCI_EXP_DEVCTL, &val);
 	pldsize = (val & PCI_EXP_DEVCTL_PAYLOAD) >> 5;
 
 	pci_read_config_word(adap->pdev, 0x2, &devid);
 	if (devid == 0x37) {
-		pci_write_config_word(adap->pdev,
-				      adap->pdev->pcie_cap + PCI_EXP_DEVCTL,
-				      val & ~PCI_EXP_DEVCTL_READRQ &
-				      ~PCI_EXP_DEVCTL_PAYLOAD);
+		pcie_capability_write_word(adap->pdev, PCI_EXP_DEVCTL,
+					   val & ~PCI_EXP_DEVCTL_READRQ &
+					   ~PCI_EXP_DEVCTL_PAYLOAD);
 		pldsize = 0;
 	}
 
-	pci_read_config_word(adap->pdev, adap->pdev->pcie_cap + PCI_EXP_LNKCTL,
-			     &val);
+	pcie_capability_read_word(adap->pdev, PCI_EXP_LNKCTL, &val);
 
 	fst_trn_tx = G_NUMFSTTRNSEQ(t3_read_reg(adap, A_PCIE_PEX_CTRL0));
 	fst_trn_rx = adap->params.rev == 0 ? fst_trn_tx :
@@ -3425,15 +3421,13 @@ out_err:
 static void get_pci_mode(struct adapter *adapter, struct pci_params *p)
 {
 	static unsigned short speed_map[] = { 33, 66, 100, 133 };
-	u32 pci_mode, pcie_cap;
+	u32 pci_mode;
 
-	pcie_cap = pci_pcie_cap(adapter->pdev);
-	if (pcie_cap) {
+	if (pci_is_pcie(adapter->pdev)) {
 		u16 val;
 
 		p->variant = PCI_VARIANT_PCIE;
-		pci_read_config_word(adapter->pdev, pcie_cap + PCI_EXP_LNKSTA,
-					&val);
+		pcie_capability_read_word(adapter->pdev, PCI_EXP_LNKSTA, &val);
 		p->width = (val >> 4) & 0x3f;
 		return;
 	}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 5ed49af..9339854 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3453,7 +3453,7 @@ static void eeh_resume(struct pci_dev *pdev)
 	rtnl_unlock();
 }
 
-static struct pci_error_handlers cxgb4_eeh = {
+static const struct pci_error_handlers cxgb4_eeh = {
 	.error_detected = eeh_err_detected,
 	.slot_reset     = eeh_slot_reset,
 	.resume         = eeh_resume,
@@ -3694,15 +3694,7 @@ static void __devinit print_port_info(const struct net_device *dev)
 
 static void __devinit enable_pcie_relaxed_ordering(struct pci_dev *dev)
 {
-	u16 v;
-	int pos;
-
-	pos = pci_pcie_cap(dev);
-	if (pos > 0) {
-		pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &v);
-		v |= PCI_EXP_DEVCTL_RELAX_EN;
-		pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, v);
-	}
+	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
 }
 
 /*
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index fa947df..af16013 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -2741,11 +2741,9 @@ static void __devinit get_pci_mode(struct adapter *adapter,
 				   struct pci_params *p)
 {
 	u16 val;
-	u32 pcie_cap = pci_pcie_cap(adapter->pdev);
 
-	if (pcie_cap) {
-		pci_read_config_word(adapter->pdev, pcie_cap + PCI_EXP_LNKSTA,
-				     &val);
+	if (pci_is_pcie(adapter->pdev)) {
+		pcie_capability_read_word(adapter->pdev, PCI_EXP_LNKSTA, &val);
 		p->speed = val & PCI_EXP_LNKSTA_CLS;
 		p->width = (val & PCI_EXP_LNKSTA_NLW) >> 4;
 	}
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 78b8aa8..95d1047 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4106,7 +4106,7 @@ err:
 	dev_err(&adapter->pdev->dev, "EEH resume failed\n");
 }
 
-static struct pci_error_handlers be_eeh_handlers = {
+static const struct pci_error_handlers be_eeh_handlers = {
 	.error_detected = be_eeh_err_detected,
 	.slot_reset = be_eeh_reset,
 	.resume = be_eeh_resume,
diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c
index 535f94f..29ce9bd 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -3157,7 +3157,7 @@ static void e100_io_resume(struct pci_dev *pdev)
 	}
 }
 
-static struct pci_error_handlers e100_err_handler = {
+static const struct pci_error_handlers e100_err_handler = {
 	.error_detected = e100_io_error_detected,
 	.slot_reset = e100_io_slot_reset,
 	.resume = e100_io_resume,
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index bde337e..f3f9aeb 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -192,7 +192,7 @@ static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 static void e1000_io_resume(struct pci_dev *pdev);
 
-static struct pci_error_handlers e1000_err_handler = {
+static const struct pci_error_handlers e1000_err_handler = {
 	.error_detected = e1000_io_error_detected,
 	.slot_reset = e1000_io_slot_reset,
 	.resume = e1000_io_resume,
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index d01a099..3f0223a 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -5584,16 +5584,15 @@ static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
 	 */
 	if (adapter->flags & FLAG_IS_QUAD_PORT) {
 		struct pci_dev *us_dev = pdev->bus->self;
-		int pos = pci_pcie_cap(us_dev);
 		u16 devctl;
 
-		pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
-		pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
-		                      (devctl & ~PCI_EXP_DEVCTL_CERE));
+		pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
+		pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
+					   (devctl & ~PCI_EXP_DEVCTL_CERE));
 
 		e1000_power_off(pdev, sleep, wake);
 
-		pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
+		pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
 	} else {
 		e1000_power_off(pdev, sleep, wake);
 	}
@@ -5607,25 +5606,15 @@ static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
 #else
 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
 {
-	int pos;
-	u16 reg16;
-
 	/*
 	 * Both device and parent should have the same ASPM setting.
 	 * Disable ASPM in downstream component first and then upstream.
 	 */
-	pos = pci_pcie_cap(pdev);
-	pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
-	reg16 &= ~state;
-	pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16);
-
-	if (!pdev->bus->self)
-		return;
+	pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, state);
 
-	pos = pci_pcie_cap(pdev->bus->self);
-	pci_read_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, &reg16);
-	reg16 &= ~state;
-	pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16);
+	if (pdev->bus->self)
+		pcie_capability_clear_word(pdev->bus->self, PCI_EXP_LNKCTL,
+					   state);
 }
 #endif
 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
@@ -6486,7 +6475,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
 }
 
 /* PCI Error Recovery (ERS) */
-static struct pci_error_handlers e1000_err_handler = {
+static const struct pci_error_handlers e1000_err_handler = {
 	.error_detected = e1000_io_error_detected,
 	.slot_reset = e1000_io_slot_reset,
 	.resume = e1000_io_resume,
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 48cc4fb..f88c822 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -217,7 +217,7 @@ static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
 static void igb_io_resume(struct pci_dev *);
 
-static struct pci_error_handlers igb_err_handler = {
+static const struct pci_error_handlers igb_err_handler = {
 	.error_detected = igb_io_error_detected,
 	.slot_reset = igb_io_slot_reset,
 	.resume = igb_io_resume,
@@ -6538,28 +6538,20 @@ static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 s32 igb_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
 {
 	struct igb_adapter *adapter = hw->back;
-	u16 cap_offset;
 
-	cap_offset = adapter->pdev->pcie_cap;
-	if (!cap_offset)
+	if (pcie_capability_read_word(adapter->pdev, reg, value))
 		return -E1000_ERR_CONFIG;
 
-	pci_read_config_word(adapter->pdev, cap_offset + reg, value);
-
 	return 0;
 }
 
 s32 igb_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
 {
 	struct igb_adapter *adapter = hw->back;
-	u16 cap_offset;
 
-	cap_offset = adapter->pdev->pcie_cap;
-	if (!cap_offset)
+	if (pcie_capability_write_word(adapter->pdev, reg, *value))
 		return -E1000_ERR_CONFIG;
 
-	pci_write_config_word(adapter->pdev, cap_offset + reg, *value);
-
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 0696abf..0ac11f5 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -2833,7 +2833,7 @@ static void __devexit igbvf_remove(struct pci_dev *pdev)
 }
 
 /* PCI Error Recovery (ERS) */
-static struct pci_error_handlers igbvf_err_handler = {
+static const struct pci_error_handlers igbvf_err_handler = {
 	.error_detected = igbvf_io_error_detected,
 	.slot_reset = igbvf_io_slot_reset,
 	.resume = igbvf_io_resume,
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index d05fc95..d99a2d5 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -115,7 +115,7 @@ static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
 static void ixgb_io_resume (struct pci_dev *pdev);
 
-static struct pci_error_handlers ixgb_err_handler = {
+static const struct pci_error_handlers ixgb_err_handler = {
 	.error_detected = ixgb_io_error_detected,
 	.slot_reset = ixgb_io_slot_reset,
 	.resume = ixgb_io_resume,
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 4326f74..ee61819 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7527,7 +7527,7 @@ static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
 		goto skip_bad_vf_detection;
 
 	bdev = pdev->bus->self;
-	while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT))
+	while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
 		bdev = bdev->bus->self;
 
 	if (!bdev)
@@ -7677,7 +7677,7 @@ static void ixgbe_io_resume(struct pci_dev *pdev)
 	netif_device_attach(netdev);
 }
 
-static struct pci_error_handlers ixgbe_err_handler = {
+static const struct pci_error_handlers ixgbe_err_handler = {
 	.error_detected = ixgbe_io_error_detected,
 	.slot_reset = ixgbe_io_slot_reset,
 	.resume = ixgbe_io_resume,
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 60ef645..6647383 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -3256,7 +3256,7 @@ static void ixgbevf_io_resume(struct pci_dev *pdev)
 }
 
 /* PCI Error Recovery (ERS) */
-static struct pci_error_handlers ixgbevf_err_handler = {
+static const struct pci_error_handlers ixgbevf_err_handler = {
 	.error_detected = ixgbevf_io_error_detected,
 	.slot_reset = ixgbevf_io_slot_reset,
 	.resume = ixgbevf_io_resume,
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 2f816c6..dd6ea94 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -2300,7 +2300,7 @@ static pci_ers_result_t mlx4_pci_slot_reset(struct pci_dev *pdev)
 	return ret ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
 }
 
-static struct pci_error_handlers mlx4_err_handler = {
+static const struct pci_error_handlers mlx4_err_handler = {
 	.error_detected = mlx4_pci_err_detected,
 	.slot_reset     = mlx4_pci_slot_reset,
 };
diff --git a/drivers/net/ethernet/mellanox/mlx4/reset.c b/drivers/net/ethernet/mellanox/mlx4/reset.c
index 11e7c1c..dd1b509 100644
--- a/drivers/net/ethernet/mellanox/mlx4/reset.c
+++ b/drivers/net/ethernet/mellanox/mlx4/reset.c
@@ -141,16 +141,16 @@ int mlx4_reset(struct mlx4_dev *dev)
 	/* Now restore the PCI headers */
 	if (pcie_cap) {
 		devctl = hca_header[(pcie_cap + PCI_EXP_DEVCTL) / 4];
-		if (pci_write_config_word(dev->pdev, pcie_cap + PCI_EXP_DEVCTL,
-					   devctl)) {
+		if (pcie_capability_write_word(dev->pdev, PCI_EXP_DEVCTL,
+					       devctl)) {
 			err = -ENODEV;
 			mlx4_err(dev, "Couldn't restore HCA PCI Express "
 				 "Device Control register, aborting.\n");
 			goto out;
 		}
 		linkctl = hca_header[(pcie_cap + PCI_EXP_LNKCTL) / 4];
-		if (pci_write_config_word(dev->pdev, pcie_cap + PCI_EXP_LNKCTL,
-					   linkctl)) {
+		if (pcie_capability_write_word(dev->pdev, PCI_EXP_LNKCTL,
+					       linkctl)) {
 			err = -ENODEV;
 			mlx4_err(dev, "Couldn't restore HCA PCI Express "
 				 "Link control register, aborting.\n");
diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index fa85cf1..83516e3 100644
--- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
+++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
@@ -1078,22 +1078,16 @@ static int myri10ge_reset(struct myri10ge_priv *mgp)
 #ifdef CONFIG_MYRI10GE_DCA
 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
 {
-	int ret, cap, err;
+	int ret;
 	u16 ctl;
 
-	cap = pci_pcie_cap(pdev);
-	if (!cap)
-		return 0;
-
-	err = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &ctl);
-	if (err)
-		return 0;
+	pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
 
 	ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
 	if (ret != on) {
 		ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
 		ctl |= (on << 4);
-		pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, ctl);
+		pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
 	}
 	return ret;
 }
@@ -3192,18 +3186,13 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
 	struct device *dev = &mgp->pdev->dev;
 	int cap;
 	unsigned err_cap;
-	u16 val;
-	u8 ext_type;
 	int ret;
 
 	if (!myri10ge_ecrc_enable || !bridge)
 		return;
 
 	/* check that the bridge is a root port */
-	cap = pci_pcie_cap(bridge);
-	pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
-	ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
-	if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
+	if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) {
 		if (myri10ge_ecrc_enable > 1) {
 			struct pci_dev *prev_bridge, *old_bridge = bridge;
 
@@ -3218,11 +3207,8 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
 						" to force ECRC\n");
 					return;
 				}
-				cap = pci_pcie_cap(bridge);
-				pci_read_config_word(bridge,
-						     cap + PCI_CAP_FLAGS, &val);
-				ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
-			} while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
+			} while (pci_pcie_type(bridge) !=
+				 PCI_EXP_TYPE_ROOT_PORT);
 
 			dev_info(dev,
 				 "Forcing ECRC on non-root port %s"
@@ -3335,11 +3321,10 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
 	int overridden = 0;
 
 	if (myri10ge_force_firmware == 0) {
-		int link_width, exp_cap;
+		int link_width;
 		u16 lnk;
 
-		exp_cap = pci_pcie_cap(mgp->pdev);
-		pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
+		pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk);
 		link_width = (lnk >> 4) & 0x3f;
 
 		/* Check to see if Link is less than 8 or if the
diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index d958c22..de50547 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -484,7 +484,7 @@ static DEFINE_PCI_DEVICE_TABLE(s2io_tbl) = {
 
 MODULE_DEVICE_TABLE(pci, s2io_tbl);
 
-static struct pci_error_handlers s2io_err_handler = {
+static const struct pci_error_handlers s2io_err_handler = {
 	.error_detected = s2io_io_error_detected,
 	.slot_reset = s2io_io_slot_reset,
 	.resume = s2io_io_resume,
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-config.c b/drivers/net/ethernet/neterion/vxge/vxge-config.c
index 32d0682..c2e420a 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-config.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-config.c
@@ -757,7 +757,7 @@ __vxge_hw_verify_pci_e_info(struct __vxge_hw_device *hldev)
 	u16 lnk;
 
 	/* Get the negotiated link width and speed from PCI config space */
-	pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
+	pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnk);
 
 	if ((lnk & PCI_EXP_LNKSTA_CLS) != 1)
 		return VXGE_HW_ERR_INVALID_PCI_INFO;
@@ -1982,7 +1982,7 @@ u16 vxge_hw_device_link_width_get(struct __vxge_hw_device *hldev)
 	struct pci_dev *dev = hldev->pdev;
 	u16 lnk;
 
-	pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
+	pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnk);
 	return (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
 }
 
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index de21904..cfa71a3 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -4799,7 +4799,7 @@ static void __devexit vxge_remove(struct pci_dev *pdev)
 			     __LINE__);
 }
 
-static struct pci_error_handlers vxge_err_handler = {
+static const struct pci_error_handlers vxge_err_handler = {
 	.error_detected = vxge_io_error_detected,
 	.slot_reset = vxge_io_slot_reset,
 	.resume = vxge_io_resume,
diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
index feb85d5..b2a94d0 100644
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
@@ -2795,7 +2795,7 @@ static const struct dev_pm_ops pch_gbe_pm_ops = {
 };
 #endif
 
-static struct pci_error_handlers pch_gbe_err_handler = {
+static const struct pci_error_handlers pch_gbe_err_handler = {
 	.error_detected = pch_gbe_io_error_detected,
 	.slot_reset = pch_gbe_io_slot_reset,
 	.resume = pch_gbe_io_resume
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
index a77c558..df45061 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
@@ -1386,7 +1386,7 @@ static void netxen_mask_aer_correctable(struct netxen_adapter *adapter)
 		adapter->ahw.board_type != NETXEN_BRDTYPE_P3_10G_TP)
 		return;
 
-	if (root->pcie_type != PCI_EXP_TYPE_ROOT_PORT)
+	if (pci_pcie_type(root) != PCI_EXP_TYPE_ROOT_PORT)
 		return;
 
 	aer_pos = pci_find_ext_capability(root, PCI_EXT_CAP_ID_ERR);
@@ -3340,7 +3340,7 @@ netxen_free_vlan_ip_list(struct netxen_adapter *adapter)
 { }
 #endif
 
-static struct pci_error_handlers netxen_err_handler = {
+static const struct pci_error_handlers netxen_err_handler = {
 	.error_detected = netxen_io_error_detected,
 	.slot_reset = netxen_io_slot_reset,
 	.resume = netxen_io_resume,
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 212c121..473ce13 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -4522,7 +4522,7 @@ static void
 qlcnic_restore_indev_addr(struct net_device *dev, unsigned long event)
 { }
 #endif
-static struct pci_error_handlers qlcnic_err_handler = {
+static const struct pci_error_handlers qlcnic_err_handler = {
 	.error_detected = qlcnic_io_error_detected,
 	.slot_reset = qlcnic_io_slot_reset,
 	.resume = qlcnic_io_resume,
diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
index b53a3b6..b262d61 100644
--- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c
+++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
@@ -4847,7 +4847,7 @@ static void qlge_io_resume(struct pci_dev *pdev)
 	netif_device_attach(ndev);
 }
 
-static struct pci_error_handlers qlge_err_handler = {
+static const struct pci_error_handlers qlge_err_handler = {
 	.error_detected = qlge_io_error_detected,
 	.slot_reset = qlge_io_slot_reset,
 	.resume = qlge_io_resume,
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index b47d5b3..a7cc560 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -833,15 +833,8 @@ static void rtl_unlock_work(struct rtl8169_private *tp)
 
 static void rtl_tx_performance_tweak(struct pci_dev *pdev, u16 force)
 {
-	int cap = pci_pcie_cap(pdev);
-
-	if (cap) {
-		u16 ctl;
-
-		pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &ctl);
-		ctl = (ctl & ~PCI_EXP_DEVCTL_READRQ) | force;
-		pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, ctl);
-	}
+	pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
+					   PCI_EXP_DEVCTL_READRQ, force);
 }
 
 struct rtl_cond {
@@ -4739,28 +4732,14 @@ static void rtl_ephy_init(struct rtl8169_private *tp, const struct ephy_info *e,
 
 static void rtl_disable_clock_request(struct pci_dev *pdev)
 {
-	int cap = pci_pcie_cap(pdev);
-
-	if (cap) {
-		u16 ctl;
-
-		pci_read_config_word(pdev, cap + PCI_EXP_LNKCTL, &ctl);
-		ctl &= ~PCI_EXP_LNKCTL_CLKREQ_EN;
-		pci_write_config_word(pdev, cap + PCI_EXP_LNKCTL, ctl);
-	}
+	pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL,
+				   PCI_EXP_LNKCTL_CLKREQ_EN);
 }
 
 static void rtl_enable_clock_request(struct pci_dev *pdev)
 {
-	int cap = pci_pcie_cap(pdev);
-
-	if (cap) {
-		u16 ctl;
-
-		pci_read_config_word(pdev, cap + PCI_EXP_LNKCTL, &ctl);
-		ctl |= PCI_EXP_LNKCTL_CLKREQ_EN;
-		pci_write_config_word(pdev, cap + PCI_EXP_LNKCTL, ctl);
-	}
+	pcie_capability_set_word(pdev, PCI_EXP_LNKCTL,
+				 PCI_EXP_LNKCTL_CLKREQ_EN);
 }
 
 #define R8168_CPCMD_QUIRK_MASK (\
@@ -5405,14 +5384,9 @@ static void rtl_hw_start_8101(struct net_device *dev)
 		tp->event_slow &= ~RxFIFOOver;
 
 	if (tp->mac_version == RTL_GIGA_MAC_VER_13 ||
-	    tp->mac_version == RTL_GIGA_MAC_VER_16) {
-		int cap = pci_pcie_cap(pdev);
-
-		if (cap) {
-			pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL,
-					      PCI_EXP_DEVCTL_NOSNOOP_EN);
-		}
-	}
+	    tp->mac_version == RTL_GIGA_MAC_VER_16)
+		pcie_capability_set_word(pdev, PCI_EXP_DEVCTL,
+					 PCI_EXP_DEVCTL_NOSNOOP_EN);
 
 	RTL_W8(Cfg9346, Cfg9346_Unlock);
 
diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index c2a0fe3..3208dca 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -9762,9 +9762,8 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
 	union niu_parent_id parent_id;
 	struct net_device *dev;
 	struct niu *np;
-	int err, pos;
+	int err;
 	u64 dma_mask;
-	u16 val16;
 
 	niu_driver_version();
 
@@ -9787,8 +9786,7 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
 		goto err_out_disable_pdev;
 	}
 
-	pos = pci_pcie_cap(pdev);
-	if (pos <= 0) {
+	if (!pci_is_pcie(pdev)) {
 		dev_err(&pdev->dev, "Cannot find PCI Express capability, aborting\n");
 		goto err_out_free_res;
 	}
@@ -9813,14 +9811,11 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
 		goto err_out_free_dev;
 	}
 
-	pci_read_config_word(pdev, pos + PCI_EXP_DEVCTL, &val16);
-	val16 &= ~PCI_EXP_DEVCTL_NOSNOOP_EN;
-	val16 |= (PCI_EXP_DEVCTL_CERE |
-		  PCI_EXP_DEVCTL_NFERE |
-		  PCI_EXP_DEVCTL_FERE |
-		  PCI_EXP_DEVCTL_URRE |
-		  PCI_EXP_DEVCTL_RELAX_EN);
-	pci_write_config_word(pdev, pos + PCI_EXP_DEVCTL, val16);
+	pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
+		PCI_EXP_DEVCTL_NOSNOOP_EN,
+		PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
+		PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE |
+		PCI_EXP_DEVCTL_RELAX_EN);
 
 	dma_mask = DMA_BIT_MASK(44);
 	err = pci_set_dma_mask(pdev, dma_mask);