[gvfs] cdda: Disconnect uevent handler immediately

[Ondrej Holy <oholy src gnome org>]

commit cd4f923ba11d06e3ac917f95cd33987d80987c0a
Author: Ondrej Holy <oholy redhat com>
Date:   Thu Jan 26 15:57:35 2017 +0100

    cdda: Disconnect uevent handler immediately
    
    Uevent handler with "remove" action may be called multiple times,
    which causes that g_vfs_backend_force_unmount is called several
    times, which may lead to segfault. Disconnect the uevent handler
    immediately after g_vfs_backend_force_unmount call.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777794

 daemon/gvfsbackendcdda.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/daemon/gvfsbackendcdda.c b/daemon/gvfsbackendcdda.c
index edce885..5660368 100644
--- a/daemon/gvfsbackendcdda.c
+++ b/daemon/gvfsbackendcdda.c
@@ -225,6 +225,8 @@ on_uevent (GUdevClient *client, gchar *action, GUdevDevice *device, gpointer use
       g_udev_device_get_property_as_int (device, "ID_CDROM_MEDIA") != 1))
     {
       g_vfs_backend_force_unmount (G_VFS_BACKEND (cdda_backend));
+
+      g_signal_handlers_disconnect_by_func (cdda_backend->gudev_client, on_uevent, cdda_backend);
     }
 }
 
@@ -416,7 +418,9 @@ do_unmount (GVfsBackend *backend,
 
   release_device (cdda_backend);
   release_metadata (cdda_backend);
-  
+
+  g_signal_handlers_disconnect_by_func (cdda_backend->gudev_client, on_uevent, cdda_backend);
+
   g_vfs_job_succeeded (G_VFS_JOB (job));
 
   //g_warning ("unmounted %p", backend);