[OpenWrt-Devel] [PATCH netifd 1/6] device: Resolve ifindex for external claimed devices

[Hans Dedecker]

Fixes regression issues introduced by commit 3224b80 as external (PPP)
device ifindex was not in sync with kernel device ifindex due to re-creation
of the device by the PPP daemon

Signed-off-by: Hans Dedecker <dedeckeh at gmail.com>
---
 device.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/device.c b/device.c
index 21b436f..a29c981 100644
--- a/device.c
+++ b/device.c
@@ -74,15 +74,14 @@ void device_unlock(void)
 static int set_device_state(struct device *dev, bool state)
 {
 	if (state) {
-		/* Set ifindex for all devices being enabled so a valid  */
+		/* Get ifindex for all devices being enabled so a valid  */
 		/* ifindex is in place avoiding possible race conditions */
 		device_set_ifindex(dev, system_if_resolve(dev));
 		if (!dev->ifindex)
 			return -1;
-	}
 
-	if (state)
 		system_if_up(dev);
+	}
 	else
 		system_if_down(dev);
 
@@ -332,7 +331,13 @@ int device_claim(struct device_user *dep)
 		return 0;
 
 	device_broadcast_event(dev, DEV_EVENT_SETUP);
-	if (!dev->external)
+	if (dev->external) {
+		/* Get ifindex for external claimed devices so a valid   */
+		/* ifindex is in place avoiding possible race conditions */
+		device_set_ifindex(dev, system_if_resolve(dev));
+		if (!dev->ifindex)
+			ret = -1;
+	} else
 		ret = dev->set_state(dev, true);
 
 	if (ret == 0)
-- 
1.9.1
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