selftests: netdevsim: sprinkle more udevadm settle

Number of tests are failing when netdev renaming is active
on the system. Add udevadm settle in logic determining
the names.

Fixes: 242aaf03dc ("selftests: add a test for ethtool pause stats")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240114224726.1210532-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

tools/testing/selftests/drivers/net/netdevsim/ethtool-common.sh

@@ -51,6 +51,7 @@ function make_netdev {
     fi
 
     echo $NSIM_ID $@ > /sys/bus/netdevsim/new_device
+    udevadm settle
     # get new device name
     ls /sys/bus/netdevsim/devices/netdevsim${NSIM_ID}/net/
 }

tools/testing/selftests/drivers/net/netdevsim/udp_tunnel_nic.sh

@@ -233,6 +233,7 @@ function print_tables {
 function get_netdev_name {
     local -n old=$1
 
+    udevadm settle
     new=$(ls /sys/class/net)
 
     for netdev in $new; do