From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gavin Shan Subject: [PATCH v8 28/45] powerpc/pci: Introduce pci_remove_device_node_info() Date: Wed, 17 Feb 2016 14:44:11 +1100 Message-ID: <1455680668-23298-29-git-send-email-gwshan@linux.vnet.ibm.com> References: <1455680668-23298-1-git-send-email-gwshan@linux.vnet.ibm.com> Return-path: In-Reply-To: <1455680668-23298-1-git-send-email-gwshan@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org To: linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, benh@kernel.crashing.org, mpe@ellerman.id.au, aik@ozlabs.ru, dja@axtens.net, bhelgaas@google.com, robherring2@gmail.com, grant.likely@linaro.org, Gavin Shan List-Id: devicetree@vger.kernel.org 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 --- 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" -- 2.1.0