tree-wide: use ERRNO_IS_TRANSIENT()

src/nspawn/nspawn.c

@@ -4211,14 +4211,15 @@ static int nspawn_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t r
         }
 
         n = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
-        if (IN_SET(n, -EAGAIN, -EINTR))
-                return 0;
-        if (n == -EXFULL) {
-                log_warning("Got message with truncated control data (too many fds sent?), ignoring.");
-                return 0;
-        }
-        if (n < 0)
+        if (n < 0) {
+                if (ERRNO_IS_TRANSIENT(n))
+                        return 0;
+                if (n == -EXFULL) {
+                        log_warning("Got message with truncated control data (too many fds sent?), ignoring.");
+                        return 0;
+                }
                 return log_warning_errno(n, "Couldn't read notification socket: %m");
+        }
 
         cmsg_close_all(&msghdr);