Merged in masayuki2009/nuttx.nuttx/tiva_with_qemu (pull request #927)

arch/arm/src/tiva: Add a workaround for tiva with qemu

With qemu, tiva_ifup() hangs because ethernet link status can not
be set correctly. This PR is a workaround to avoid this issue.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

Approved-by: Gregory Nutt <gnutt@nuttx.org>

arch/arm/src/tiva/Kconfig

@@ -1381,6 +1381,10 @@ config TIVA_DUMPPACKET
 	---help---
 		Dump each packet received/sent to the console.
 
+config TIVA_WITH_QEMU
+	bool "Workaround for tiva with qemu"
+	default n
+
 endmenu # Stellaris Ethernet Configuration
 
 menu "Ethernet Configuration"

arch/arm/src/tiva/lm/lm3s_ethernet.c

@@ -1345,6 +1345,7 @@ static int tiva_ifup(struct net_driver_s *dev)
    * set
    */
 
+#ifndef CONFIG_TIVA_WITH_QEMU
   ninfo("Waiting for link\n");
   do
     {
@@ -1352,6 +1353,7 @@ static int tiva_ifup(struct net_driver_s *dev)
     }
   while ((phyreg & MII_MSR_LINKSTATUS) == 0);
   ninfo("Link established\n");
+#endif
 
   /* Reset the receive FIFO */