From: Jiang Liu Date: Thu, 6 Jun 2013 17:10:08 +0000 (+0800) Subject: PCI: Fix refcount issue in pci_create_root_bus() error recovery path X-Git-Tag: v3.11-rc1~100^2~2^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=343df771e671d821478dd3ef525a0610b808dbf8;p=profile%2Fivi%2Fkernel-x86-ivi.git PCI: Fix refcount issue in pci_create_root_bus() error recovery path After calling device_register(&bridge->dev), the bridge is reference- counted, and it is illegal to call kfree() on it except in the release function. [bhelgaas: changelog, use put_device() after device_register() failure] Signed-off-by: Jiang Liu Signed-off-by: Bjorn Helgaas Cc: stable@vger.kernel.org --- diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index ed5ce18..15c39cb 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1711,12 +1711,16 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, bridge->dev.release = pci_release_bus_bridge_dev; dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); error = pcibios_root_bridge_prepare(bridge); - if (error) - goto bridge_dev_reg_err; + if (error) { + kfree(bridge); + goto err_out; + } error = device_register(&bridge->dev); - if (error) - goto bridge_dev_reg_err; + if (error) { + put_device(&bridge->dev); + goto err_out; + } b->bridge = get_device(&bridge->dev); device_enable_async_suspend(b->bridge); pci_set_bus_of_node(b); @@ -1772,8 +1776,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, class_dev_reg_err: put_device(&bridge->dev); device_unregister(&bridge->dev); -bridge_dev_reg_err: - kfree(bridge); err_out: kfree(b); return NULL;