net: Export auto_load, use it in rarp

The rarp code includes another instance of the auto_load logic, so call
what is now net_auto_load() instead.

This also fixes an incorrect call to TftpStart() which was never seen
since apparently no boards enable rarp.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>

include/net.h

@@ -430,6 +430,12 @@ extern int	NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, i
 extern void	NetReceive(volatile uchar *, int);
 
 /*
+ * Check if autoload is enabled. If so, use either NFS or TFTP to download
+ * the boot file.
+ */
+void net_auto_load(void);
+
+/*
  * The following functions are a bit ugly, but necessary to deal with
  * alignment restrictions on ARM.
  *

net/bootp.c

@@ -138,36 +138,6 @@ static int truncate_sz (const char *name, int maxlen, int curlen)
 	return (curlen);
 }
 
-/*
- * Check if autoload is enabled. If so, use either NFS or TFTP to download
- * the boot file.
- */
-static void auto_load(void)
-{
-	const char *s = getenv("autoload");
-
-	if (s != NULL) {
-		if (*s == 'n') {
-			/*
-			 * Just use BOOTP to configure system;
-			 * Do not use TFTP to load the bootfile.
-			 */
-			NetState = NETLOOP_SUCCESS;
-			return;
-		}
-#if defined(CONFIG_CMD_NFS)
-		if (strcmp(s, "NFS") == 0) {
-			/*
-			 * Use NFS to load the bootfile.
-			 */
-			NfsStart();
-			return;
-		}
-#endif
-	}
-	TftpStart(TFTPGET);
-}
-
 #if !defined(CONFIG_CMD_DHCP)
 
 static void BootpVendorFieldProcess (u8 * ext)
@@ -354,7 +324,7 @@ BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 
 	debug("Got good BOOTP\n");
 
-	auto_load();
+	net_auto_load();
 }
 #endif
 
@@ -979,7 +949,7 @@ DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 			dhcp_state = BOUND;
 			printf ("DHCP client bound to address %pI4\n", &NetOurIP);
 
-			auto_load();
+			net_auto_load();
 			return;
 		}
 		break;

net/net.c

@@ -309,6 +309,36 @@ void ArpTimeoutCheck(void)
 	}
 }
 
+/*
+ * Check if autoload is enabled. If so, use either NFS or TFTP to download
+ * the boot file.
+ */
+void net_auto_load(void)
+{
+	const char *s = getenv("autoload");
+
+	if (s != NULL) {
+		if (*s == 'n') {
+			/*
+			 * Just use BOOTP/RARP to configure system;
+			 * Do not use TFTP to load the bootfile.
+			 */
+			NetState = NETLOOP_SUCCESS;
+			return;
+		}
+#if defined(CONFIG_CMD_NFS)
+		if (strcmp(s, "NFS") == 0) {
+			/*
+			 * Use NFS to load the bootfile.
+			 */
+			NfsStart();
+			return;
+		}
+#endif
+	}
+	TftpStart(TFTPGET);
+}
+
 static void NetInitLoop(enum proto_t protocol)
 {
 	static int env_changed_id;

net/rarp.c

@@ -46,24 +46,8 @@ static void
 RarpHandler(uchar *dummi0, unsigned dummi1, IPaddr_t sip, unsigned dummi2,
 	    unsigned dummi3)
 {
-	char *s;
 	debug("Got good RARP\n");
-	if ((s = getenv("autoload")) != NULL) {
-		if (*s == 'n') {
-			/*
-			 * Just use RARP to configure system;
-			 * Do not use TFTP/NFS to to load the bootfile.
-			 */
-			NetState = NETLOOP_SUCCESS;
-			return;
-#if defined(CONFIG_CMD_NFS)
-		} else if ((s != NULL) && !strcmp(s, "NFS")) {
-			NfsStart();
-			return;
-#endif
-		}
-	}
-	TftpStart ();
+	net_auto_load();
 }