From d30ff534b9cf7d371a7073b8fe047ff724071dd7 Mon Sep 17 00:00:00 2001
From: VilhoRaatikka <vilho.raatikka@skysql.com>
Date: Wed, 25 Jun 2014 15:37:44 +0300
Subject: [PATCH] In dcb.c:dcb_read if there is nothing anymore to read from
 socket, it wasn't caught anyway. Added test for that case and immediate exit
 in that case.

---
 server/core/dcb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server/core/dcb.c b/server/core/dcb.c
index 9c58748bf..c7e6179b6 100644
--- a/server/core/dcb.c
+++ b/server/core/dcb.c
@@ -660,6 +660,11 @@ int dcb_read(
                         n = 0;
                         goto return_n;
                 }
+                else if (b == 0)
+                {
+                        n = 0;
+                        goto return_n;
+                }
                 bufsize = MIN(b, MAX_BUFFER_SIZE);
                 
                 if ((buffer = gwbuf_alloc(bufsize)) == NULL)