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[5/9] char: introduce udp_chr_detach()

Message ID b81cfba61d9016ec21bf211c5c443f030ec2595f.1377666450.git.amit.shah@redhat.com
State New
Headers show

Commit Message

Amit Shah Aug. 28, 2013, 5:10 a.m. UTC 
Remove any registered callbacks if a frontend is detached.

CC: <qemu-stable@nongnu.org>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
 qemu-char.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/qemu-char.c b/qemu-char.c
index befecf2..4b26ff9 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2198,6 +2198,16 @@  typedef struct {
     int max_size;
 } NetCharDriver;
 
+static void udp_chr_detach(CharDriverState *chr)
+{
+    NetCharDriver *s = chr->opaque;
+
+    if (s->tag) {
+        io_remove_watch_poll(s->tag);
+        s->tag = 0;
+    }
+}
+
 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 {
     NetCharDriver *s = chr->opaque;
@@ -2309,6 +2319,7 @@  static CharDriverState *qemu_chr_open_udp_fd(int fd)
     chr->chr_write = udp_chr_write;
     chr->chr_update_read_handler = udp_chr_update_read_handler;
     chr->chr_close = udp_chr_close;
+    chr->chr_detach = udp_chr_detach;
     /* be isn't opened until we get a connection */
     chr->explicit_be_open = true;
     return chr;