[gvfs] mtp: Handle uevents only in case of mount success

[Ondrej Holy <oholy src gnome org>]

commit dec2f32531872014a99a318fb18f9bb889e6c8d0
Author: Ondrej Holy <oholy redhat com>
Date:   Fri Feb 16 10:13:22 2018 +0100

    mtp: Handle uevents only in case of mount success
    
    Uevents handler can be connected even if mount operation failed (e.g.
    device is unplugged in the middle of mount operation). Backend is
    consequently finalized, however, g_vfs_backend_force_unmount can be
    still called from on_uevent in the meantime. This might cause segfaults
    in certain cases.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787992

 daemon/gvfsbackendmtp.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/daemon/gvfsbackendmtp.c b/daemon/gvfsbackendmtp.c
index 556a197..5469763 100644
--- a/daemon/gvfsbackendmtp.c
+++ b/daemon/gvfsbackendmtp.c
@@ -931,14 +931,14 @@ do_mount (GVfsBackend *backend,
   op_backend->volume_symbolic_icon = g_vfs_get_volume_symbolic_icon (device);
   g_object_unref (device);
 
-  g_signal_connect (op_backend->gudev_client, "uevent", G_CALLBACK (on_uevent), op_backend);
-
-  op_backend->file_cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
-
   LIBMTP_Init ();
 
   get_device (backend, host, G_VFS_JOB (job));
   if (!G_VFS_JOB (job)->failed) {
+    g_signal_connect (op_backend->gudev_client, "uevent", G_CALLBACK (on_uevent), op_backend);
+
+    op_backend->file_cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+
     GMountSpec *mtp_mount_spec = g_mount_spec_new ("mtp");
     g_mount_spec_set (mtp_mount_spec, "host", host);
     g_vfs_backend_set_mount_spec (backend, mtp_mount_spec);