From 5b3829247a3edf89ebc63e8c2be2554fd66dfd41 Mon Sep 17 00:00:00 2001
From: Amos Kong <akong@redhat.com>
Date: Sat, 23 Nov 2013 03:48:48 +0100
Subject: [PATCH 13/14] rng-egd: offset the point when repeatedly read from the buffer

RH-Author: Amos Kong <akong@redhat.com>
Message-id: <1385178528-7953-1-git-send-email-akong@redhat.com>
Patchwork-id: 55868
O-Subject: [RHEL-7.0 qemu-kvm PATCH] rng-egd: offset the point when repeatedly read from the buffer
Bugzilla: 1032862
RH-Acked-by: Fam Zheng <famz@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Vlad Yasevich <vyasevic@redhat.com>
RH-Acked-by: Amit Shah <amit.shah@redhat.com>
RH-Acked-by: Xiao Wang <jasowang@redhat.com>

Bugzilla: 1032862
Brew: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=6634396

The buffer content might be read out more than once, currently
we just repeatedly read the first data block, buffer offset is
missing.

Cc: qemu-stable@nongnu.org
Signed-off-by: Amos Kong <akong@redhat.com>
Message-id: 1385023371-8198-3-git-send-email-akong@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
(cherry picked from commit 1eb1bd9eafa890f1f4d16ef5cb8b9239a86874d9)
---
 backends/rng-egd.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 backends/rng-egd.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/backends/rng-egd.c b/backends/rng-egd.c
index 9e5a536..2962795 100644
--- a/backends/rng-egd.c
+++ b/backends/rng-egd.c
@@ -91,12 +91,14 @@ static int rng_egd_chr_can_read(void *opaque)
 static void rng_egd_chr_read(void *opaque, const uint8_t *buf, int size)
 {
     RngEgd *s = RNG_EGD(opaque);
+    size_t buf_offset = 0;
 
     while (size > 0 && s->requests) {
         RngRequest *req = s->requests->data;
         int len = MIN(size, req->size - req->offset);
 
-        memcpy(req->data + req->offset, buf, len);
+        memcpy(req->data + req->offset, buf + buf_offset, len);
+        buf_offset += len;
         req->offset += len;
         size -= len;
 
-- 
1.7.1