Prism54: Convert mgmt_sem to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 5 insertions, 4 deletions

diff --git a/drivers/net/wireless/prism54/islpci_dev.c b/drivers/net/wireless/prism54/islpci_dev.c
index 219dd651dc41..dbb538ccb4ec 100644
--- a/drivers/net/wireless/prism54/islpci_dev.c
+++ b/drivers/net/wireless/prism54/islpci_dev.c
@@ -861,7 +861,7 @@ islpci_setup(struct pci_dev *pdev)
         init_waitqueue_head(&priv->reset_done);
 
         /* init the queue read locks, process wait counter */
-        sema_init(&priv->mgmt_sem, 1);
+        mutex_init(&priv->mgmt_lock);
         priv->mgmt_received = NULL;
         init_waitqueue_head(&priv->mgmt_wqueue);
         sema_init(&priv->stats_sem, 1);
diff --git a/drivers/net/wireless/prism54/islpci_dev.h b/drivers/net/wireless/prism54/islpci_dev.h
index 736666da6c24..4e0182ce835b 100644
--- a/drivers/net/wireless/prism54/islpci_dev.h
+++ b/drivers/net/wireless/prism54/islpci_dev.h
@@ -26,6 +26,7 @@
 #include <linux/wireless.h>
 #include <net/iw_handler.h>
 #include <linux/list.h>
+#include <linux/mutex.h>
 
 #include "isl_38xx.h"
 #include "isl_oid.h"
@@ -164,7 +165,7 @@ typedef struct {
         wait_queue_head_t reset_done;
 
         /* used by islpci_mgt_transaction */
-        struct semaphore mgmt_sem; /* serialize access to mailbox and wqueue */
+        struct mutex mgmt_lock; /* serialize access to mailbox and wqueue */
         struct islpci_mgmtframe *mgmt_received;   /* mbox for incoming frame */
         wait_queue_head_t mgmt_wqueue;            /* waitqueue for mbox */
 
diff --git a/drivers/net/wireless/prism54/islpci_mgt.c b/drivers/net/wireless/prism54/islpci_mgt.c
index 2246f7930b4e..f7c677e2094d 100644
--- a/drivers/net/wireless/prism54/islpci_mgt.c
+++ b/drivers/net/wireless/prism54/islpci_mgt.c
@@ -460,7 +460,7 @@ islpci_mgt_transaction(struct net_device *ndev,
 
         *recvframe = NULL;
 
-        if (down_interruptible(&priv->mgmt_sem))
+        if (mutex_lock_interruptible(&priv->mgmt_lock))
                 return -ERESTARTSYS;
 
         prepare_to_wait(&priv->mgmt_wqueue, &wait, TASK_UNINTERRUPTIBLE);
@@ -504,7 +504,7 @@ islpci_mgt_transaction(struct net_device *ndev,
         /* TODO: we should reset the device here */
  out:
         finish_wait(&priv->mgmt_wqueue, &wait);
-        up(&priv->mgmt_sem);
+        mutex_unlock(&priv->mgmt_lock);
         return err;
 }