[PATCH] pcmcia: release_class

Properly wait for the class refcount to reach zero.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 0ff4d6ec8b770eb0b7a43dbe68efb96a3718d9e5..e82859d3227a61e661d159acaf8b3d1c51a7f9fa 100644 (file)
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -903,17 +903,29 @@ static int pcmcia_socket_hotplug(struct class_device *dev, char **envp,
 }
 
 
+static struct completion pcmcia_unload;
+
+static void pcmcia_release_socket_class(struct class *data)
+{
+       complete(&pcmcia_unload);
+}
+
+
 struct class pcmcia_socket_class = {
        .name = "pcmcia_socket",
         .hotplug = pcmcia_socket_hotplug,
        .release = pcmcia_release_socket,
+       .class_release = pcmcia_release_socket_class,
 };
 EXPORT_SYMBOL(pcmcia_socket_class);
 
 
 static int __init init_pcmcia_cs(void)
 {
-       int ret = class_register(&pcmcia_socket_class);
+       int ret;
+
+       init_completion(&pcmcia_unload);
+       ret = class_register(&pcmcia_socket_class);
        if (ret)
                return (ret);
        return class_interface_register(&pccard_sysfs_interface);
@@ -923,6 +935,8 @@ static void __exit exit_pcmcia_cs(void)
 {
        class_interface_unregister(&pccard_sysfs_interface);
        class_unregister(&pcmcia_socket_class);
+
+       wait_for_completion(&pcmcia_unload);
 }
 
 subsys_initcall(init_pcmcia_cs);