Messages in this thread Patch in this message | | | Date | Thu, 19 Apr 2007 11:49:45 +0200 | From | Matthias Kaehlcke <> | Subject | [PATCH] use mutex instead of binary semaphore in FORE Systems 200E-series driver for ATM |
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use mutex instead of binary semaphore in FORE Systems 200E-series driver for ATM
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
---
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c index a7c0ed3..7ab827d 100644 --- a/drivers/atm/fore200e.c +++ b/drivers/atm/fore200e.c @@ -1502,9 +1502,9 @@ fore200e_open(struct atm_vcc *vcc) /* pseudo-CBR bandwidth requested? */ if ((vcc->qos.txtp.traffic_class == ATM_CBR) && (vcc->qos.txtp.max_pcr > 0)) { - down(&fore200e->rate_sf); + mutex_lock(&fore200e->rate_mtx); if (fore200e->available_cell_rate < vcc->qos.txtp.max_pcr) { - up(&fore200e->rate_sf); + mutex_unlock(&fore200e->rate_mtx); kfree(fore200e_vcc); vc_map->vcc = NULL; @@ -1513,7 +1513,7 @@ fore200e_open(struct atm_vcc *vcc) /* reserve bandwidth */ fore200e->available_cell_rate -= vcc->qos.txtp.max_pcr; - up(&fore200e->rate_sf); + mutex_unlock(&fore200e->rate_mtx); } vcc->itf = vcc->dev->number; @@ -1599,9 +1599,9 @@ fore200e_close(struct atm_vcc* vcc) /* release reserved bandwidth, if any */ if ((vcc->qos.txtp.traffic_class == ATM_CBR) && (vcc->qos.txtp.max_pcr > 0)) { - down(&fore200e->rate_sf); + mutex_lock(&fore200e->rate_mtx); fore200e->available_cell_rate += vcc->qos.txtp.max_pcr; - up(&fore200e->rate_sf); + mutex_unlock(&fore200e->rate_mtx); clear_bit(ATM_VF_HASQOS, &vcc->flags); } @@ -2064,16 +2064,16 @@ fore200e_change_qos(struct atm_vcc* vcc,struct atm_qos* qos, int flags) if ((qos->txtp.traffic_class == ATM_CBR) && (qos->txtp.max_pcr > 0)) { - down(&fore200e->rate_sf); + mutex_lock(&fore200e->rate_mtx); if (fore200e->available_cell_rate + vcc->qos.txtp.max_pcr < qos->txtp.max_pcr) { - up(&fore200e->rate_sf); + mutex_unlock(&fore200e->rate_mtx); return -EAGAIN; } fore200e->available_cell_rate += vcc->qos.txtp.max_pcr; fore200e->available_cell_rate -= qos->txtp.max_pcr; - up(&fore200e->rate_sf); + mutex_unlock(&fore200e->rate_mtx); memcpy(&vcc->qos, qos, sizeof(struct atm_qos)); @@ -2459,7 +2459,7 @@ fore200e_initialize(struct fore200e* fore200e) DPRINTK(2, "device %s being initialized\n", fore200e->name); - init_MUTEX(&fore200e->rate_sf); + mutex_init(&fore200e->rate_mtx); spin_lock_init(&fore200e->q_lock); cpq = fore200e->cp_queues = fore200e->virt_base + FORE200E_CP_QUEUES_OFFSET; diff --git a/drivers/atm/fore200e.h b/drivers/atm/fore200e.h index f9abfda..b85a546 100644 --- a/drivers/atm/fore200e.h +++ b/drivers/atm/fore200e.h @@ -869,7 +869,7 @@ typedef struct fore200e { struct stats* stats; /* last snapshot of the stats */ - struct semaphore rate_sf; /* protects rate reservation ops */ + struct mutex rate_mtx; /* protects rate reservation ops */ spinlock_t q_lock; /* protects queue ops */ #ifdef FORE200E_USE_TASKLET struct tasklet_struct tx_tasklet; /* performs tx interrupt work */ -- Matthias Kaehlcke Linux Application Developer Barcelona
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