[Qemu-devel] [PATCH 3/3 resend v2] arch_init: right return for ram_save_iterate

[Lei Li <lilei@linux.vnet.ibm.com>]

qemu_file_rate_limit() never return negative value since the refactor
by Commit 1964a39, this patch gets rid of the negative check for it,
adjust bytes_transferred and return value correspondingly in 
ram_save_iterate().

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

Change since v1:
  Return fixes and improvement from Paolo Bonzini.
  
 arch_init.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch_init.c b/arch_init.c
index 94d45e1..a26bc89 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -709,15 +709,20 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
      */
     ram_control_after_iterate(f, RAM_CONTROL_ROUND);
 
+    bytes_transferred += total_sent;
+
+    /*
+     * Do not count these 8 bytes into total_sent, so that we can
+     * return 0 if no page had been dirtied.
+     */
+    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
+    bytes_transferred += 8;
+
+    ret = qemu_file_get_error(f);
     if (ret < 0) {
-        bytes_transferred += total_sent;
         return ret;
     }
 
-    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
-    total_sent += 8;
-    bytes_transferred += total_sent;
-
     return total_sent;
 }
 
-- 
1.7.7.6