[RFC] ShellPkg/Ping: fix loss of first packet

[Meenakshi <meenakshi.aggarwal@nxp.com>]

From: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>

Issue:
Reply for first ping packet was getting dropped.

Cause:
Sometimes reply message comes even before trasmit
function returns, hence missing 1st reply

Fix:
Prepare the TxList before calling Transmit function.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
---
 ShellPkg/Library/UefiShellNetwork1CommandsLib/Ping.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ShellPkg/Library/UefiShellNetwork1CommandsLib/Ping.c b/ShellPkg/Library/UefiShellNetwork1CommandsLib/Ping.c
index bec9535..46ba701 100644
--- a/ShellPkg/Library/UefiShellNetwork1CommandsLib/Ping.c
+++ b/ShellPkg/Library/UefiShellNetwork1CommandsLib/Ping.c
@@ -784,14 +784,17 @@ PingSendEchoRequest (
   }
 
   ASSERT(Private->ProtocolPointers.Transmit != NULL);
+
+  InsertTailList (&Private->TxList, &TxInfo->Link);
+
   Status = Private->ProtocolPointers.Transmit (Private->IpProtocol, TxInfo->Token);
 
   if (EFI_ERROR (Status)) {
+    RemoveEntryList (&TxInfo->Link);
     PingDestroyTxInfo (TxInfo, Private->IpChoice);
     return Status;
   }
 
-  InsertTailList (&Private->TxList, &TxInfo->Link);
   Private->TxCount++;
 
   return EFI_SUCCESS;
-- 
1.9.1