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prism54: Convert stats_sem in a mutex

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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>
This commit is contained in:
Matthias Kaehlcke 2008-02-15 20:56:59 +01:00 committed by John W. Linville
parent 6f865c0ab9
commit f8139218b3
3 changed files with 6 additions and 6 deletions
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8
drivers/net/wireless/prism54/isl_ioctl.c
View File

@ -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;

2
drivers/net/wireless/prism54/islpci_dev.c
View File

@ -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 */

2
drivers/net/wireless/prism54/islpci_dev.h
View File

@ -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.