From 0a930cf0785a075f3d839a39e73ac8975c91e584 Mon Sep 17 00:00:00 2001
From: Mark Johnston <markj@FreeBSD.org>
Date: Tue, 4 Jul 2017 00:02:06 +0000
Subject: [PATCH] Hold the PCI device list lock when removing an element.

MFC after:	1 week
---
 sys/compat/linuxkpi/common/src/linux_pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
index 84a38d875564..c6710674feae 100644
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -254,7 +254,9 @@ pci_unregister_driver(struct pci_driver *pdrv)
 
 	bus = devclass_find("pci");
 
+	spin_lock(&pci_lock);
 	list_del(&pdrv->links);
+	spin_unlock(&pci_lock);
 	mtx_lock(&Giant);
 	if (bus != NULL)
 		devclass_delete_driver(bus, &pdrv->driver);