From 8eebb6a9e5e74ec0ef40902e2da53d24559b94a4 Mon Sep 17 00:00:00 2001
From: Filipe Brandenburger <filbranden@google.com>
Date: Thu, 15 Mar 2018 10:42:38 -0700
Subject: [PATCH] udev/net-id: Fix check for address to keep interface names
 stable (#8458)

This was a bug inadvertently added by commit 73fc96c8ac0aa9.

The intent of the check is to "match slot address with device by
stripping the function" (as the comment above states it), for example
match network device PCI address 0000:05:00.0 (including a .0 for
function) to PCI slot address 0000:05:00, but changing that to a streq()
call prevented the match.

Change that to startswith(), which should both fix the bug and make the
intent of the check more clear and prevent unintentional bugs from being
introduced by future refactorings.
---
 src/udev/udev-builtin-net_id.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index 36994360c7..6efa712930 100644
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -297,7 +297,7 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
                 if (snprintf_ok(str, sizeof str, "%s/%s/address", slots, dent->d_name) &&
                     read_one_line_file(str, &address) >= 0)
                         /* match slot address with device by stripping the function */
-                        if (streq(address, udev_device_get_sysname(names->pcidev)))
+                        if (startswith(udev_device_get_sysname(names->pcidev), address))
                                 hotplug_slot = i;
 
                 if (hotplug_slot > 0)
-- 
2.16.2