[U-Boot] [PATCH 1/1] net:Fix potential empty DHCP Parameter Request List

[Jason Liu]

From: Gray Remlin <g_remlin at rocketmail.com>

Can't get IP address with dhcp due to the dhcp server not
allow the empty param list request under some network env

Signed-off-by: Gray Remlin <g_remlin at rocketmail.com>
Signed-off-by: Jason Liu <r64343 at freescale.com>
---
 net/bootp.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/net/bootp.c b/net/bootp.c
index e679f8b..c87d0c2 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -417,9 +417,19 @@ static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t R
 		return x - start;
 #endif
 
+#if defined(CONFIG_BOOTP_SUBNETMASK) || \
+    defined(CONFIG_BOOTP_TIMEOFFSET) || \
+    defined(CONFIG_BOOTP_GATEWAY) || \
+    defined(CONFIG_BOOTP_DNS) || \
+    defined(CONFIG_BOOTP_HOSTNAME) || \
+    defined(CONFIG_BOOTP_BOOTFILESIZE) || \
+    defined(CONFIG_BOOTP_BOOTPATH) || \
+    defined(CONFIG_BOOTP_NISDOMAIN) || \
+    defined(CONFIG_BOOTP_NTPSERVER)
 	*e++ = 55;		/* Parameter Request List */
 	 cnt = e++;		/* Pointer to count of requested items */
 	*cnt = 0;
+#endif
 #if defined(CONFIG_BOOTP_SUBNETMASK)
 	*e++  = 1;		/* Subnet Mask */
 	*cnt += 1;
-- 
1.7.0.4