[Qemu-devel] [PULL 31/32] chardev: use per-dev context for io_add_watch_poll

[Paolo Bonzini <pbonzini@redhat.com>]

From: Peter Xu <peterx@redhat.com>

It was only passed in by chr_update_read_handlers().  However when
reconnect, we'll lose that context information.  So if a chardev was
running on another context (rather than the default context, the NULL
pointer), it'll switch back to the default context if reconnection
happens.  But, it should really stick to the old context.

Convert all the callers of io_add_watch_poll() to use the internally
cached gcontext.  Then the context should be able to survive even after
reconnections.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1505975754-21555-4-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-fd.c     | 2 +-
 chardev/char-pty.c    | 2 +-
 chardev/char-socket.c | 4 ++--
 chardev/char-udp.c    | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/chardev/char-fd.c b/chardev/char-fd.c
index 6a62a54..09fbb07 100644
--- a/chardev/char-fd.c
+++ b/chardev/char-fd.c
@@ -94,7 +94,7 @@ static void fd_chr_update_read_handler(Chardev *chr,
         chr->gsource = io_add_watch_poll(chr, s->ioc_in,
                                            fd_chr_read_poll,
                                            fd_chr_read, chr,
-                                           context);
+                                           chr->gcontext);
     }
 }
 
diff --git a/chardev/char-pty.c b/chardev/char-pty.c
index e5d20a0..d239c04 100644
--- a/chardev/char-pty.c
+++ b/chardev/char-pty.c
@@ -219,7 +219,7 @@ static void pty_chr_state(Chardev *chr, int connected)
             chr->gsource = io_add_watch_poll(chr, s->ioc,
                                                pty_chr_read_poll,
                                                pty_chr_read,
-                                               chr, NULL);
+                                               chr, chr->gcontext);
         }
     }
 }
diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index 1ae730a..ee71cbe 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -516,7 +516,7 @@ static void tcp_chr_connect(void *opaque)
         chr->gsource = io_add_watch_poll(chr, s->ioc,
                                            tcp_chr_read_poll,
                                            tcp_chr_read,
-                                           chr, NULL);
+                                           chr, chr->gcontext);
     }
     qemu_chr_be_event(chr, CHR_EVENT_OPENED);
 }
@@ -535,7 +535,7 @@ static void tcp_chr_update_read_handler(Chardev *chr,
         chr->gsource = io_add_watch_poll(chr, s->ioc,
                                            tcp_chr_read_poll,
                                            tcp_chr_read, chr,
-                                           context);
+                                           chr->gcontext);
     }
 }
 
diff --git a/chardev/char-udp.c b/chardev/char-udp.c
index 4ee11d3..106dee1 100644
--- a/chardev/char-udp.c
+++ b/chardev/char-udp.c
@@ -110,7 +110,7 @@ static void udp_chr_update_read_handler(Chardev *chr,
         chr->gsource = io_add_watch_poll(chr, s->ioc,
                                            udp_chr_read_poll,
                                            udp_chr_read, chr,
-                                           context);
+                                           chr->gcontext);
     }
 }
 
-- 
1.8.3.1