pcmcia: use ops_mutex for rsrc_{mgr,nonstatic} locking

Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 13277eebe46a..7ba45b0cca6b 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -224,7 +224,9 @@ int pcmcia_register_socket(struct pcmcia_socket *socket)
         spin_lock_init(&socket->thread_lock);
 
         if (socket->resource_ops->init) {
+                mutex_lock(&socket->ops_mutex);
                 ret = socket->resource_ops->init(socket);
+                mutex_unlock(&socket->ops_mutex);
                 if (ret)
                         goto err;
         }
@@ -282,8 +284,11 @@ void pcmcia_unregister_socket(struct pcmcia_socket *socket)
         up_write(&pcmcia_socket_list_rwsem);
 
         /* wait for sysfs to drop all references */
-        if (socket->resource_ops->exit)
+        if (socket->resource_ops->exit) {
+                mutex_lock(&socket->ops_mutex);
                 socket->resource_ops->exit(socket);
+                mutex_unlock(&socket->ops_mutex);
+        }
         wait_for_completion(&socket->socket_released);
 } /* pcmcia_unregister_socket */
 EXPORT_SYMBOL(pcmcia_unregister_socket);