[patch 06/12] Link newly created pci child bus to its parent on creation
DORMANTno replies
From: Rajesh Shah <hidden>
Date: 2005-03-18 22:16:26
Also in:
lkml
When a pci child bus is created, add it to the parent's children list immediately rather than waiting till pci_bus_add_devices(). For hot-plug bridges/devices, pci_bus_add_devices() may be called much later, after they have been properly configured. In the meantime, this allows us to use the normal pci bus search functions for the hot-plug bridges/buses. Signed-off-by: Rajesh Shah <redacted> --- linux-2.6.11-mm4-iohp-rshah1/drivers/pci/bus.c | 11 +++++++---- linux-2.6.11-mm4-iohp-rshah1/drivers/pci/probe.c | 4 ++-- 2 files changed, 9 insertions(+), 6 deletions(-) diff -puN drivers/pci/probe.c~pci_link_child_bus drivers/pci/probe.c
--- linux-2.6.11-mm4-iohp/drivers/pci/probe.c~pci_link_child_bus 2005-03-16 13:07:18.745444812 -0800
+++ linux-2.6.11-mm4-iohp-rshah1/drivers/pci/probe.c 2005-03-16 13:07:18.857749498 -0800@@ -457,7 +457,7 @@ int __devinit pci_scan_bridge(struct pci return max; } - child = pci_alloc_child_bus(bus, dev, busnr); + child = pci_add_new_bus(bus, dev, busnr); if (!child) return max; child->primary = buses & 0xFF;
@@ -484,7 +484,7 @@ int __devinit pci_scan_bridge(struct pci * This can happen when a bridge is hot-plugged */ if (pci_find_bus(pci_domain_nr(bus), max+1)) return max; - child = pci_alloc_child_bus(bus, dev, ++max); + child = pci_add_new_bus(bus, dev, ++max); buses = (buses & 0xff000000) | ((unsigned int)(child->primary) << 0) | ((unsigned int)(child->secondary) << 8)
diff -puN drivers/pci/bus.c~pci_link_child_bus drivers/pci/bus.c
--- linux-2.6.11-mm4-iohp/drivers/pci/bus.c~pci_link_child_bus 2005-03-16 13:07:18.749351062 -0800
+++ linux-2.6.11-mm4-iohp-rshah1/drivers/pci/bus.c 2005-03-16 13:07:18.858726061 -0800@@ -121,10 +121,13 @@ void __devinit pci_bus_add_devices(struc * If there is an unattached subordinate bus, attach * it and then scan for unattached PCI devices. */ - if (dev->subordinate && list_empty(&dev->subordinate->node)) { - spin_lock(&pci_bus_lock); - list_add_tail(&dev->subordinate->node, &dev->bus->children); - spin_unlock(&pci_bus_lock); + if (dev->subordinate) { + if (list_empty(&dev->subordinate->node)) { + spin_lock(&pci_bus_lock); + list_add_tail(&dev->subordinate->node, + &dev->bus->children); + spin_unlock(&pci_bus_lock); + } pci_bus_add_devices(dev->subordinate); sysfs_create_link(&dev->subordinate->class_dev.kobj, &dev->dev.kobj, "bridge");
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