Re: [PATCH v8 28/45] powerpc/pci: Introduce pci_remove_device_node_info()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 02/17/2016 02:44 PM, Gavin Shan wrote:
This implements and exports pci_remove_device_node_info(). It's
used to remove the pdn (struct pci_dn) for the indicated device
node. The function is going to be used by PowerNV PCI hotplug
driver.

Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>

Kind of strange that there is no such helper for pseries, is there?


Reviewed-by: Alexey Kardashevskiy <aik@xxxxxxxxx>


---
  arch/powerpc/include/asm/pci-bridge.h |  1 +
  arch/powerpc/kernel/pci_dn.c          | 23 +++++++++++++++++++++++
  2 files changed, 24 insertions(+)

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 72a9d4e..c6310e2 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -240,6 +240,7 @@ extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev);
  extern void remove_dev_pci_data(struct pci_dev *pdev);
  extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
  					       struct device_node *dn);
+extern void pci_remove_device_node_info(struct device_node *dn);

  static inline int pci_device_from_OF_node(struct device_node *np,
  					  u8 *bus, u8 *devfn)
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 0a249ff..ce10281 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -331,6 +331,29 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
  }
  EXPORT_SYMBOL_GPL(pci_add_device_node_info);

+void pci_remove_device_node_info(struct device_node *dn)
+{
+	struct pci_dn *pdn = dn ? PCI_DN(dn) : NULL;
+#ifdef CONFIG_EEH
+	struct eeh_dev *edev = pdn_to_eeh_dev(pdn);
+
+	if (edev)
+		edev->pdn = NULL;
+#endif
+
+	if (!pdn)
+		return;
+
+	WARN_ON(!list_empty(&pdn->child_list));
+	list_del(&pdn->list);
+	if (pdn->parent)
+		of_node_put(pdn->parent->node);
+
+	dn->data = NULL;
+	kfree(pdn);
+}
+EXPORT_SYMBOL_GPL(pci_remove_device_node_info);
+
  /*
   * Traverse a device tree stopping each PCI device in the tree.
   * This is done depth first.  As each node is processed, a "pre"



--
Alexey
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux