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PCI: don't publish new root bus until it's fully initialized

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When pci_create_root_bus() adds the new struct pci_bus to the global
pci_root_buses list, the bus becomes visible to other parts of the
kernel, so it should be fully initialized.

This patch delays adding the bus to the pci_root_buses list until after
all the struct pci_bus initialization is finished.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2012-02-23 20:18:59 -07:00
parent 844393f4c5
commit a5390aa6dc
1 changed files with 4 additions and 4 deletions
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8
drivers/pci/probe.c
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@ -1569,10 +1569,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
goto err_out; goto err_out;
} }
down_write(&pci_bus_sem);
list_add_tail(&b->node, &pci_root_buses);
up_write(&pci_bus_sem);
dev->parent = parent; dev->parent = parent;
dev->release = pci_release_bus_bridge_dev; dev->release = pci_release_bus_bridge_dev;
dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus); dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus);
@ -1612,6 +1608,10 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
dev_info(&b->dev, "root bus resource %pR\n", res); dev_info(&b->dev, "root bus resource %pR\n", res);
} }
down_write(&pci_bus_sem);
list_add_tail(&b->node, &pci_root_buses);
up_write(&pci_bus_sem);
return b; return b;
class_dev_reg_err: class_dev_reg_err: