From 07241c205c2c0b3e5e17e883c8ae523e90d172c2 Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Thu, 21 Sep 2017 14:35:51 +0800
Subject: [PATCH] chardev: new qemu_chr_be_update_read_handlers()
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Add a wrapper for the chr_update_read_handler().

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1505975754-21555-2-git-send-email-peterx@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 chardev/char-fe.c      |  7 ++-----
 chardev/char.c         | 10 ++++++++++
 include/chardev/char.h | 10 ++++++++++
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/chardev/char-fe.c b/chardev/char-fe.c
index f3af6ae584..ee6d596100 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -253,7 +253,6 @@ void qemu_chr_fe_set_handlers(CharBackend *b,
                               bool set_open)
 {
     Chardev *s;
-    ChardevClass *cc;
     int fe_open;
 
     s = b->chr;
@@ -261,7 +260,6 @@ void qemu_chr_fe_set_handlers(CharBackend *b,
         return;
     }
 
-    cc = CHARDEV_GET_CLASS(s);
     if (!opaque && !fd_can_read && !fd_read && !fd_event) {
         fe_open = 0;
         remove_fd_in_watch(s);
@@ -273,9 +271,8 @@ void qemu_chr_fe_set_handlers(CharBackend *b,
     b->chr_event = fd_event;
     b->chr_be_change = be_change;
     b->opaque = opaque;
-    if (cc->chr_update_read_handler) {
-        cc->chr_update_read_handler(s, context);
-    }
+
+    qemu_chr_be_update_read_handlers(s, context);
 
     if (set_open) {
         qemu_chr_fe_set_open(b, fe_open);
diff --git a/chardev/char.c b/chardev/char.c
index b6fd5eb6a6..e090dd5a27 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -180,6 +180,16 @@ void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len)
     }
 }
 
+void qemu_chr_be_update_read_handlers(Chardev *s,
+                                      GMainContext *context)
+{
+    ChardevClass *cc = CHARDEV_GET_CLASS(s);
+
+    if (cc->chr_update_read_handler) {
+        cc->chr_update_read_handler(s, context);
+    }
+}
+
 int qemu_chr_add_client(Chardev *s, int fd)
 {
     return CHARDEV_GET_CLASS(s)->chr_add_client ?
diff --git a/include/chardev/char.h b/include/chardev/char.h
index 66dde4637e..2068ea496d 100644
--- a/include/chardev/char.h
+++ b/include/chardev/char.h
@@ -168,6 +168,16 @@ void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len);
  */
 void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len);
 
+/**
+ * @qemu_chr_be_update_read_handlers:
+ *
+ * Invoked when frontend read handlers are setup
+ *
+ * @context the gcontext that will be used to attach the watch sources
+ */
+void qemu_chr_be_update_read_handlers(Chardev *s,
+                                      GMainContext *context);
+
 /**
  * @qemu_chr_be_event:
  *