From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Mon, 3 Sep 2012 17:07:05 +0900 From: Taku Izumi To: Taku Izumi Cc: linux-pci@vger.kernel.org, bhelgaas@google.com, linux-acpi@vger.kernel.org, kaneshige.kenji@jp.fujitsu.com, yinghai@kernel.org, jiang.liu@huawei.com Subject: [PATCH v2 6/6] ACPI, PCI: add resoruce-assign code for devices under hot-added hostbridge Message-Id: <20120903170705.4e6dbc2c.izumi.taku@jp.fujitsu.com> In-Reply-To: <20120903165831.29aed72c.izumi.taku@jp.fujitsu.com> References: <20120903165831.29aed72c.izumi.taku@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-acpi-owner@vger.kernel.org List-ID: Devices under hot-added hostbridge have no chance to assign resources and to configure them, so this patch adds such code for hot-added hostbridges at acpi_pci_root_start(). Signed-off-by: Taku Izumi --- drivers/acpi/pci_root.c | 17 +++++++++++++++++ include/acpi/acpi_bus.h | 1 + 2 files changed, 18 insertions(+) Index: Bjorn-next-0903/drivers/acpi/pci_root.c =================================================================== --- Bjorn-next-0903.orig/drivers/acpi/pci_root.c +++ Bjorn-next-0903/drivers/acpi/pci_root.c @@ -39,6 +39,7 @@ #include #include #include +#include #define PREFIX "ACPI: " @@ -461,6 +462,9 @@ static int __devinit acpi_pci_root_add(s if (!root) return -ENOMEM; + if (system_state != SYSTEM_BOOTING) + root->hot_added = true; + segment = 0; status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, &segment); @@ -639,6 +643,7 @@ static int acpi_pci_root_start(struct ac { struct acpi_pci_root *root = acpi_driver_data(device); struct acpi_pci_driver *driver; + struct pci_dev *pdev; mutex_lock(&acpi_pci_root_lock); list_for_each_entry(driver, &acpi_pci_drivers, node) @@ -646,6 +651,18 @@ static int acpi_pci_root_start(struct ac driver->add(device->handle); mutex_unlock(&acpi_pci_root_lock); + /* + * Devices under hot-added hostbridge have no chance to assign + * resources and to configure them, so do that here + */ + if (root->hot_added) { + pci_bus_size_bridges(root->bus); + pci_bus_assign_resources(root->bus); + list_for_each_entry(pdev, &root->bus->devices, bus_list) + pci_configure_slot(pdev); + pci_enable_bridges(root->bus); + } + pci_bus_add_devices(root->bus); return 0; Index: Bjorn-next-0903/include/acpi/acpi_bus.h =================================================================== --- Bjorn-next-0903.orig/include/acpi/acpi_bus.h +++ Bjorn-next-0903/include/acpi/acpi_bus.h @@ -407,6 +407,7 @@ struct acpi_pci_root { u32 osc_support_set; /* _OSC state of support bits */ u32 osc_control_set; /* _OSC state of control bits */ phys_addr_t mcfg_addr; + bool hot_added; }; /* helper */