[PATCHv2] teamd: return 0 if tdport doesn't exist in teamd_config_port_set

[Xin Long]

This issue can be reproduced by doing:

  # ip link add dummy1 type dummy
  # teamd -t team0 -c '{"runner": {"name":
"activebackup"}}' -d
  # teamdctl team0 port config update dummy1 '{"prio": -10}'
  # ip link set dummy0 master team0

and the error shows:

  libteamdctl: usock: Error message received: "ConfigUpdateFail"
  libteamdctl: usock: Error message content: "Failed to update config."
  command call failed (Invalid argument)

It's a regression caused by Commit c8b356a3cd36 ("teamd: config: update
local prio to kernel") where it requires the tdport has to exist when
a tdport config is being updated. However teamd supports for the port
config going first before the port being enslaved.

This issue breaks how NM-team starts a team device. Here to fix it by
returning 0 even if the tdport doesn't exist in teamd_config_port_set.

Reported-by: Radek Vykydal <rvykydal(a)redhat.com&gt;
Fixes: c8b356a3cd36 ("teamd: config: update local prio to kernel")
Signed-off-by: Xin Long <lucien.xin(a)gmail.com&gt;
---
 teamd/teamd_config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/teamd/teamd_config.c b/teamd/teamd_config.c
index 34fef1f..1bf85ac 100644
--- a/teamd/teamd_config.c
+++ b/teamd/teamd_config.c
@@ -164,7 +164,7 @@ static int teamd_config_port_set(struct teamd_context *ctx, const char
*port_nam
 
 	tdport = teamd_get_port_by_ifname(ctx, port_name);
 	if (!tdport)
-		return -ENODEV;
+		return 0;
 
 	config = json_object_get(port_obj, "prio");
 	if (json_is_integer(config)) {
-- 
2.1.0