prism54: Convert stats_sem in a mutex

The semaphore stats_sem is used as mutex, convert it to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Acked-by: Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 6 insertions, 6 deletions

diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index df1594ea942c..3fb6a7b54038 100644
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -165,7 +165,7 @@ prism54_update_stats(struct work_struct *work)
         struct obj_bss bss, *bss2;
         union oid_res_t r;
 
-        down(&priv->stats_sem);
+        mutex_lock(&priv->stats_lock);
 
 /* Noise floor.
  * I'm not sure if the unit is dBm.
@@ -207,7 +207,7 @@ prism54_update_stats(struct work_struct *work)
         mgt_get_request(priv, DOT11_OID_MPDUTXFAILED, 0, NULL, &r);
         priv->local_iwstatistics.discard.retries = r.u;
 
-        up(&priv->stats_sem);
+        mutex_unlock(&priv->stats_lock);
 
         return;
 }
@@ -218,12 +218,12 @@ prism54_get_wireless_stats(struct net_device *ndev)
         islpci_private *priv = netdev_priv(ndev);
 
         /* If the stats are being updated return old data */
-        if (down_trylock(&priv->stats_sem) == 0) {
+        if (mutex_trylock(&priv->stats_lock) == 0) {
                 memcpy(&priv->iwstatistics, &priv->local_iwstatistics,
                        sizeof (struct iw_statistics));
                 /* They won't be marked updated for the next time */
                 priv->local_iwstatistics.qual.updated = 0;
-                up(&priv->stats_sem);
+                mutex_unlock(&priv->stats_lock);
         } else
                 priv->iwstatistics.qual.updated = 0;
 
diff --git a/drivers/net/wireless/prism54/islpci_dev.c b/drivers/net/wireless/prism54/islpci_dev.c
index dbb538ccb4ec..eb7c1c6bcd8a 100644
--- a/drivers/net/wireless/prism54/islpci_dev.c
+++ b/drivers/net/wireless/prism54/islpci_dev.c
@@ -864,7 +864,7 @@ islpci_setup(struct pci_dev *pdev)
         mutex_init(&priv->mgmt_lock);
         priv->mgmt_received = NULL;
         init_waitqueue_head(&priv->mgmt_wqueue);
-        sema_init(&priv->stats_sem, 1);
+        mutex_init(&priv->stats_lock);
         spin_lock_init(&priv->slock);
 
         /* init state machine with off#1 state */
diff --git a/drivers/net/wireless/prism54/islpci_dev.h b/drivers/net/wireless/prism54/islpci_dev.h
index b03a2ab0009b..85ddf89967af 100644
--- a/drivers/net/wireless/prism54/islpci_dev.h
+++ b/drivers/net/wireless/prism54/islpci_dev.h
@@ -88,7 +88,7 @@ typedef struct {
 
         /* Take care of the wireless stats */
         struct work_struct stats_work;
-        struct semaphore stats_sem;
+        struct mutex stats_lock;
         /* remember when we last updated the stats */
         unsigned long stats_timestamp;
         /* The first is accessed under semaphore locking.