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-rw-r--r--drivers/pci/pci-acpi.c2
-rw-r--r--drivers/pci/pci.c24
-rw-r--r--drivers/pci/probe.c2
-rw-r--r--drivers/pci/quirks.c2
-rw-r--r--drivers/thunderbolt/switch.c4
-rw-r--r--include/linux/pci.h23
6 files changed, 19 insertions, 38 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index d21969fba6ab..d820a55ae71c 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -948,7 +948,7 @@ static bool acpi_pci_bridge_d3(struct pci_dev *dev)
* Look for a special _DSD property for the root port and if it
* is set we know the hierarchy behind it supports D3 just fine.
*/
- root = pci_find_pcie_root_port(dev);
+ root = pcie_find_root_port(dev);
if (!root)
return false;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index bb78f580814e..227a3a979ec4 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -752,30 +752,6 @@ struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res)
EXPORT_SYMBOL(pci_find_resource);
/**
- * pci_find_pcie_root_port - return PCIe Root Port
- * @dev: PCI device to query
- *
- * Traverse up the parent chain and return the PCIe Root Port PCI Device
- * for a given PCI Device.
- */
-struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev)
-{
- struct pci_dev *bridge, *highest_pcie_bridge = dev;
-
- bridge = pci_upstream_bridge(dev);
- while (bridge && pci_is_pcie(bridge)) {
- highest_pcie_bridge = bridge;
- bridge = pci_upstream_bridge(bridge);
- }
-
- if (pci_pcie_type(highest_pcie_bridge) != PCI_EXP_TYPE_ROOT_PORT)
- return NULL;
-
- return highest_pcie_bridge;
-}
-EXPORT_SYMBOL(pci_find_pcie_root_port);
-
-/**
* pci_wait_for_pending - wait for @mask bit(s) to clear in status word @pos
* @dev: the PCI device to operate on
* @pos: config space offset of status word
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 77b8a145c39b..cdff469ba070 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2056,7 +2056,7 @@ static void pci_configure_relaxed_ordering(struct pci_dev *dev)
* For now, we only deal with Relaxed Ordering issues with Root
* Ports. Peer-to-Peer DMA is another can of worms.
*/
- root = pci_find_pcie_root_port(dev);
+ root = pcie_find_root_port(dev);
if (!root)
return;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 28c9a2409c50..885044d050a6 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4319,7 +4319,7 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a02, PCI_CLASS_NOT_DEFINED,
*/
static void quirk_disable_root_port_attributes(struct pci_dev *pdev)
{
- struct pci_dev *root_port = pci_find_pcie_root_port(pdev);
+ struct pci_dev *root_port = pcie_find_root_port(pdev);
if (!root_port) {
pci_warn(pdev, "PCIe Completion erratum may cause device errors\n");
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index a2ce99051c51..d92c7554520b 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -263,7 +263,7 @@ static void nvm_authenticate_start_dma_port(struct tb_switch *sw)
* itself. To be on the safe side keep the root port in D0 during
* the whole upgrade process.
*/
- root_port = pci_find_pcie_root_port(sw->tb->nhi->pdev);
+ root_port = pcie_find_root_port(sw->tb->nhi->pdev);
if (root_port)
pm_runtime_get_noresume(&root_port->dev);
}
@@ -272,7 +272,7 @@ static void nvm_authenticate_complete_dma_port(struct tb_switch *sw)
{
struct pci_dev *root_port;
- root_port = pci_find_pcie_root_port(sw->tb->nhi->pdev);
+ root_port = pcie_find_root_port(sw->tb->nhi->pdev);
if (root_port)
pm_runtime_put(&root_port->dev);
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0453ee458ab1..bbd6510065a7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1025,7 +1025,6 @@ void pci_bus_add_device(struct pci_dev *dev);
void pci_read_bridge_bases(struct pci_bus *child);
struct resource *pci_find_parent_resource(const struct pci_dev *dev,
struct resource *res);
-struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
@@ -2143,17 +2142,23 @@ static inline int pci_pcie_type(const struct pci_dev *dev)
return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
}
+/**
+ * pcie_find_root_port - Get the PCIe root port device
+ * @dev: PCI device
+ *
+ * Traverse up the parent chain and return the PCIe Root Port PCI Device
+ * for a given PCI/PCIe Device.
+ */
static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
{
- while (1) {
- if (!pci_is_pcie(dev))
- break;
- if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
- return dev;
- if (!dev->bus->self)
- break;
- dev = dev->bus->self;
+ struct pci_dev *bridge = pci_upstream_bridge(dev);
+
+ while (bridge) {
+ if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT)
+ return bridge;
+ bridge = pci_upstream_bridge(bridge);
}
+
return NULL;
}