1 files changed, 6 insertions, 5 deletions

diff --git a/networking/udhcp/signalpipe.c b/networking/udhcp/signalpipe.c
index b101b4ce4..2ff78f0f2 100644
--- a/networking/udhcp/signalpipe.c
+++ b/networking/udhcp/signalpipe.c
@@ -40,6 +40,7 @@ void FAST_FUNC udhcp_sp_setup(void)
         xpiped_pair(signal_pipe);
         close_on_exec_on(signal_pipe.rd);
         close_on_exec_on(signal_pipe.wr);
+        ndelay_on(signal_pipe.rd);
         ndelay_on(signal_pipe.wr);
         bb_signals(0
                 + (1 << SIGUSR1)
@@ -61,20 +62,20 @@ void FAST_FUNC udhcp_sp_fd_set(struct pollfd pfds[2], int extra_fd)
                 pfds[1].fd = extra_fd;
                 pfds[1].events = POLLIN;
         }
+        /* this simplifies "is extra_fd ready?" tests elsewhere: */
+        pfds[1].revents = 0;
 }
 
 /* Read a signal from the signal pipe. Returns 0 if there is
  * no signal, -1 on error (and sets errno appropriately), and
  * your signal on success */
-int FAST_FUNC udhcp_sp_read(struct pollfd pfds[2])
+int FAST_FUNC udhcp_sp_read(void)
 {
         unsigned char sig;
 
-        if (!pfds[0].revents)
-                return 0;
-
+        /* Can't block here, fd is in nonblocking mode */
         if (safe_read(signal_pipe.rd, &sig, 1) != 1)
-                return -1;
+                return 0;
 
         return sig;
 }