diff --git a/src/core/service.c b/src/core/service.c
index 3d065bf487..fa2c6996ad 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -3648,7 +3648,11 @@ static void service_notify_message(
                         }
                         if (r > 0) {
                                 service_set_main_pid(s, new_main_pid);
-                                unit_watch_pid(UNIT(s), new_main_pid);
+
+                                r = unit_watch_pid(UNIT(s), new_main_pid);
+                                if (r < 0)
+                                        log_unit_warning_errno(UNIT(s), r, "Failed to watch new main PID "PID_FMT" for service: %m", new_main_pid);
+
                                 notify_dbus = true;
                         }
                 }
diff --git a/src/udev/udev-watch.c b/src/udev/udev-watch.c
index cfcb310d23..04182b2e15 100644
--- a/src/udev/udev-watch.c
+++ b/src/udev/udev-watch.c
@@ -127,16 +127,16 @@ int udev_watch_end(sd_device *dev) {
         if (inotify_fd < 0)
                 return log_error_errno(EINVAL, "Invalid inotify descriptor.");
 
+        r = sd_device_get_devname(dev, &devnode);
+        if (r < 0)
+                return log_error_errno(r, "Failed to get device name: %m");
+
         r = device_get_watch_handle(dev, &wd);
         if (r == -ENOENT)
                 return 0;
         if (r < 0)
                 return log_error_errno(r, "Failed to get watch handle for device '%s', ignoring: %m", devnode);
 
-        r = sd_device_get_devname(dev, &devnode);
-        if (r < 0)
-                return log_error_errno(r, "Failed to get device name: %m");
-
         log_debug("Removing watch on '%s'", devnode);
         (void) inotify_rm_watch(inotify_fd, wd);
 
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index ea1476e7dd..4f77243c15 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -555,7 +555,7 @@ static void event_run(Manager *manager, struct event *event) {
                 if (count < 0) {
                         log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",
                                         worker->pid, count);
-                        kill(worker->pid, SIGKILL);
+                        (void) kill(worker->pid, SIGKILL);
                         worker->state = WORKER_KILLED;
                         continue;
                 }
@@ -629,7 +629,7 @@ static void manager_kill_workers(Manager *manager) {
                         continue;
 
                 worker->state = WORKER_KILLED;
-                kill(worker->pid, SIGTERM);
+                (void) kill(worker->pid, SIGTERM);
         }
 }