qemu-char: Add fe_open tracking

Add tracking of the fe_open state to struct CharDriverState.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Message-id: 1364292483-16564-4-git-send-email-hdegoede@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/qemu-char.c b/qemu-char.c
index 345fd67fca..c9890ad20f 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3412,6 +3412,10 @@ void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
 
 void qemu_chr_fe_open(struct CharDriverState *chr)
 {
+    if (chr->fe_open) {
+        return;
+    }
+    chr->fe_open = 1;
     if (chr->chr_guest_open) {
         chr->chr_guest_open(chr);
     }
@@ -3419,6 +3423,10 @@ void qemu_chr_fe_open(struct CharDriverState *chr)
 
 void qemu_chr_fe_close(struct CharDriverState *chr)
 {
+    if (!chr->fe_open) {
+        return;
+    }
+    chr->fe_open = 0;
     if (chr->chr_guest_close) {
         chr->chr_guest_close(chr);
     }