Messages in this thread Patch in this message |  | | | Subject | [PATCH] acpi bridge hotadd: Take the PCI lock when modifying pci bus or device lists | | Date | Mon, 27 Jun 2005 22:32:52 -0700 | | From | Greg KH <> |
[PATCH] acpi bridge hotadd: Take the PCI lock when modifying pci bus or device lists
With root bridge and pci bridge hot-plug, new buses and devices can be added or removed at run time. Protect the pci bus and device lists with the pci lock when doing so.
Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- commit e4ea9bb7e9f177e03a917b1f1213de0315f819ee tree 482599b5f367e997dfe30590860091bb06219882 parent cc57450f5c044270d2cf1dd437c1850422262109 author Rajesh Shah <rajesh.shah@intel.com> Thu, 28 Apr 2005 00:25:48 -0700 committer Greg Kroah-Hartman <gregkh@suse.de> Mon, 27 Jun 2005 21:52:40 -0700 drivers/pci/probe.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -374,8 +374,11 @@ struct pci_bus * __devinit pci_add_new_b struct pci_bus *child; child = pci_alloc_child_bus(parent, dev, busnr); - if (child) + if (child) { + spin_lock(&pci_bus_lock); list_add_tail(&child->node, &parent->children); + spin_unlock(&pci_bus_lock); + } return child; } @@ -765,7 +768,9 @@ pci_scan_single_device(struct pci_bus *b * and the bus list for fixup functions, etc. */ INIT_LIST_HEAD(&dev->global_list); + spin_lock(&pci_bus_lock); list_add_tail(&dev->bus_list, &bus->devices); + spin_unlock(&pci_bus_lock); return dev; } @@ -886,7 +891,9 @@ struct pci_bus * __devinit pci_scan_bus_ pr_debug("PCI: Bus %04x:%02x already known\n", pci_domain_nr(b), bus); goto err_out; } + spin_lock(&pci_bus_lock); list_add_tail(&b->node, &pci_root_buses); + spin_unlock(&pci_bus_lock); memset(dev, 0, sizeof(*dev)); dev->parent = parent; @@ -928,7 +935,9 @@ class_dev_create_file_err: class_dev_reg_err: device_unregister(dev); dev_reg_err: + spin_lock(&pci_bus_lock); list_del(&b->node); + spin_unlock(&pci_bus_lock); err_out: kfree(dev); kfree(b); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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