From: Yijing Wang <wangyijing@huawei.com>
Date: Fri, 17 Jul 2015 09:16:32 +0000 (+0800)
Subject: PCI: Hold pci_slot_mutex while searching bus->slots list
X-Git-Tag: omap-for-v4.3/fixes-merge-window~31^2~3^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=017ffe64e8b8c8db0f50433a71da41c6a4e12710;p=pandora-kernel.git

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>
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