[PATCH 11/15] pcmcia: do not lock socket driver module on card insert

[Dominik Brodowski]

Do not lock the socket driver module on card insert, as
the PCMCIA core can handle a socket module removal, at least
if we add a call to socket_remove() on pccardd()'s shutdown.

Signed-off-by: Dominik Brodowski <li...@dominikbrodowski.net>
---
 drivers/pcmcia/cs.c          |   10 +++++++---
 drivers/pcmcia/cs_internal.h |   14 --------------
 2 files changed, 7 insertions(+), 17 deletions(-)

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 800fa88..d5dce55 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -407,7 +407,7 @@ static void socket_shutdown(struct pcmcia_socket *s)
                           "*** DANGER *** unable to remove socket power\n");
        }
 
-       cs_socket_put(s);
+       s->state &= ~SOCKET_INUSE;
 }
 
 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
@@ -496,8 +496,8 @@ static int socket_insert(struct pcmcia_socket *skt)
 
        dev_dbg(&skt->dev, "insert\n");
 
-       if (!cs_socket_get(skt))
-               return -ENODEV;
+       WARN_ON(skt->state & SOCKET_INUSE);
+       skt->state |= SOCKET_INUSE;
 
        ret = socket_setup(skt, setup_delay);
        if (ret == 0) {
@@ -697,6 +697,10 @@ static int pccardd(void *__skt)
        /* make sure we are running before we exit */
        set_current_state(TASK_RUNNING);
 
+       /* shut down socket, if a device is still present */
+       if (skt->state & SOCKET_PRESENT)
+               socket_remove(skt);
+
        /* remove from the device core */
        pccard_sysfs_remove_socket(&skt->dev);
        device_unregister(&skt->dev);
diff --git a/drivers/pcmcia/cs_internal.h b/drivers/pcmcia/cs_internal.h
index 3bc02d5..0ef6b58 100644
--- a/drivers/pcmcia/cs_internal.h
+++ b/drivers/pcmcia/cs_internal.h
@@ -87,23 +87,9 @@ struct pccard_resource_ops {
 #define SOCKET_CARDBUS         0x8000
 #define SOCKET_CARDBUS_CONFIG  0x10000
 
-static inline int cs_socket_get(struct pcmcia_socket *skt)
-{
-       int ret;
-
-       WARN_ON(skt->state & SOCKET_INUSE);
-
-       ret = try_module_get(skt->owner);
-       if (ret)
-               skt->state |= SOCKET_INUSE;
-       return ret;
-}
-
 static inline void cs_socket_put(struct pcmcia_socket *skt)
 {
        if (skt->state & SOCKET_INUSE) {
-               skt->state &= ~SOCKET_INUSE;
-               module_put(skt->owner);
        }
 }
 
-- 
1.6.3.3


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