linux-kernel - [PATCH net-next] net: ipconfig: Wait for deferred device probes

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Message-Id: <20191120160236.4459-1-tbogendoerfer@suse.de>
Date:   Wed, 20 Nov 2019 17:02:36 +0100
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next] net: ipconfig: Wait for deferred device probes

If network device drives are using deferred probing, it was possible
that waiting for devices to show up in ipconfig was already over,
when the device eventually showed up. By calling wait_for_device_probe()
we now make sure deferred probing is done before checking for available
devices.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
---
 net/ipv4/ipconfig.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 9bcca08efec9..49b2381e857e 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -1412,6 +1412,9 @@ static int __init wait_for_devices(void)
 		struct net_device *dev;
 		int found = 0;
 
+		/* make sure deferred device probes are finished */
+		wait_for_device_probe();
+
 		rtnl_lock();
 		for_each_netdev(&init_net, dev) {
 			if (ic_is_init_dev(dev)) {
-- 
2.16.4