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>
diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index df1594e..3fb6a7b 100644
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -165,7 +165,7 @@
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 @@
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 @@
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 dbb538c..eb7c1c6 100644
--- a/drivers/net/wireless/prism54/islpci_dev.c
+++ b/drivers/net/wireless/prism54/islpci_dev.c
@@ -864,7 +864,7 @@
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 b03a2ab..85ddf89 100644
--- a/drivers/net/wireless/prism54/islpci_dev.h
+++ b/drivers/net/wireless/prism54/islpci_dev.h
@@ -88,7 +88,7 @@
/* 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.
