pcmcia: add locking to set_mem_map()

Protect the pccard_operations callback "set_mem_map" by a new
mutex ops_mutex. This mutex also protects the following values
in struct pcmcia_socket:

        pccard_mem_map          win[]
        pccard_mem_map          cis_mem
        void __iomem            *cis_virt

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

1 files changed, 2 insertions, 0 deletions

diff --git a/include/pcmcia/ss.h b/include/pcmcia/ss.h
index 9ab53d872489..e756069859b5 100644
--- a/include/pcmcia/ss.h
+++ b/include/pcmcia/ss.h
@@ -203,6 +203,8 @@ struct pcmcia_socket {
         unsigned int                    thread_events;
         /* protects socket h/w state */
         struct mutex                    skt_mutex;
+        /* protects PCMCIA state */
+        struct mutex                    ops_mutex;
         /* protects thread_events */
         spinlock_t                      thread_lock;