When global.net.server is set, barebox will attempt to bring up all
interfaces on ifup -a1 to see which interface can resolve it.

That can take a while and there's no way to abort that, so stick in a
ctrlc(), so user can change their mind (and e.g. remove
global.net.server, so ifup -a1 takes first interface that has link up).

Signed-off-by: Ahmad Fatoum <[email protected]>
---
 net/ifup.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/net/ifup.c b/net/ifup.c
index 64298b44ebf3..993d2a115fda 100644
--- a/net/ifup.c
+++ b/net/ifup.c
@@ -276,7 +276,7 @@ static bool ifup_edev_need_conf(struct eth_device *edev)
                edev->global_mode != ETH_MODE_DISABLED;
 }
 
-static void __ifup_all_parallel(unsigned flags)
+static int __ifup_all_parallel(unsigned flags)
 {
        struct eth_device *edev;
        unsigned netdev_count = 0;
@@ -292,6 +292,9 @@ static void __ifup_all_parallel(unsigned flags)
        start = get_time_ns();
        while (netdev_count && !is_timeout(start, PHY_AN_TIMEOUT * SECOND)) {
                for_each_netdev(edev) {
+                       if (ctrlc())
+                               return -EINTR;
+
                        if (!ifup_edev_need_conf(edev))
                                continue;
 
@@ -306,21 +309,28 @@ static void __ifup_all_parallel(unsigned flags)
                        netdev_count--;
 
                        if ((flags & IFUP_FLAG_UNTIL_NET_SERVER) && 
net_get_server())
-                               return;
+                               return 0;
                }
        }
+
+       return 0;
 }
 
-static void __ifup_all_sequence(unsigned flags)
+static int __ifup_all_sequence(unsigned flags)
 {
        struct eth_device *edev;
 
        for_each_netdev(edev) {
+               if (ctrlc())
+                       return -EINTR;
+
                ifup_edev(edev, flags);
 
                if ((flags & IFUP_FLAG_UNTIL_NET_SERVER) && net_get_server())
-                       return;
+                       return 0;
        }
+
+       return 0;
 }
 
 int ifup_all(unsigned flags)
@@ -358,11 +368,9 @@ int ifup_all(unsigned flags)
                flags &= ~IFUP_FLAG_UNTIL_NET_SERVER;
 
        if (flags & IFUP_FLAG_PARALLEL)
-               __ifup_all_parallel(flags);
+               return __ifup_all_parallel(flags);
        else
-               __ifup_all_sequence(flags);
-
-       return 0;
+               return __ifup_all_sequence(flags);
 }
 
 void ifdown_all(void)
-- 
2.39.2


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