From patchwork Tue Sep 25 08:26:02 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [01/29] PCI, x86: Separate out pcibios_allocate_bridge_resources() Date: Mon, 24 Sep 2012 22:26:02 -0000 From: Yinghai Lu X-Patchwork-Id: 186708 Message-Id: <1348561590-28067-2-git-send-email-yinghai@kernel.org> To: Bjorn Helgaas , Len Brown Cc: linux-pci@vger.kernel.org, Yinghai Lu , x86@kernel.org Thus pcibios_allocate_bus_resources() could more simple and clean. Signed-off-by: Yinghai Lu Cc: x86@kernel.org --- arch/x86/pci/i386.c | 46 ++++++++++++++++++++++++---------------------- 1 files changed, 24 insertions(+), 22 deletions(-) diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index dd8ca6f..9800362 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -193,34 +193,36 @@ EXPORT_SYMBOL(pcibios_align_resource); * as well. */ -static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) +static void __init pcibios_allocate_bridge_resources(struct pci_dev *dev) { - struct pci_bus *bus; - struct pci_dev *dev; int idx; struct resource *r; + for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) { + r = &dev->resource[idx]; + if (!r->flags) + continue; + if (!r->start || pci_claim_resource(dev, idx) < 0) { + /* + * Something is wrong with the region. + * Invalidate the resource to prevent + * child resource allocations in this + * range. + */ + r->start = r->end = 0; + r->flags = 0; + } + } +} + +static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) +{ + struct pci_bus *bus; + /* Depth-First Search on bus tree */ list_for_each_entry(bus, bus_list, node) { - if ((dev = bus->self)) { - for (idx = PCI_BRIDGE_RESOURCES; - idx < PCI_NUM_RESOURCES; idx++) { - r = &dev->resource[idx]; - if (!r->flags) - continue; - if (!r->start || - pci_claim_resource(dev, idx) < 0) { - /* - * Something is wrong with the region. - * Invalidate the resource to prevent - * child resource allocations in this - * range. - */ - r->start = r->end = 0; - r->flags = 0; - } - } - } + if (bus->self) + pcibios_allocate_bridge_resources(bus->self); pcibios_allocate_bus_resources(&bus->children); } }