tree e15b309ad6ebf5322bb3c2a54ba244750dd57c0b
parent 67546762978f523749eac157903e0b01c18e083a
author Yijing Wang <wangyijing@huawei.com> 1437124592 +0800
committer Bjorn Helgaas <bhelgaas@google.com> 1438291193 -0500

PCI: Hold pci_slot_mutex while searching bus->slots list

Previously, pci_setup_device() and similar functions searched the
pci_bus->slots list without any locking.  It was possible for another
thread to update the list while we searched it.

Add pci_dev_assign_slot() to search the list while holding pci_slot_mutex.

[bhelgaas: changelog, fold in CONFIG_SYSFS fix]
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>