[Qemu-devel] [PATCH 4/9] char: introduce pty_chr_detach()

[Amit Shah <amit.shah@redhat.com>]

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(+)

diff --git a/qemu-char.c b/qemu-char.c
index 91ae1da..befecf2 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -1036,6 +1036,16 @@ typedef struct {
 static void pty_chr_update_read_handler(CharDriverState *chr);
 static void pty_chr_state(CharDriverState *chr, int connected);
 
+static void pty_chr_detach(struct CharDriverState *chr)
+{
+    PtyCharDriver *s = chr->opaque;
+
+    if (s->fd_tag) {
+        io_remove_watch_poll(s->fd_tag);
+        s->fd_tag = 0;
+    }
+}
+
 static gboolean pty_chr_timer(gpointer opaque)
 {
     struct CharDriverState *chr = opaque;
@@ -1215,6 +1225,7 @@ static CharDriverState *qemu_chr_open_pty(const char *id,
     chr->chr_update_read_handler = pty_chr_update_read_handler;
     chr->chr_close = pty_chr_close;
     chr->chr_add_watch = pty_chr_add_watch;
+    chr->chr_detach = pty_chr_detach;
     chr->explicit_be_open = true;
 
     s->fd = io_channel_from_fd(master_fd);
-- 
1.8.3.1