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Date: Thu, 26 Apr 2007 00:27:37 -0700
From: akpm@...ux-foundation.org
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, akpm@...ux-foundation.org,
matthias.kaehlcke@...il.com
Subject: [patch 15/15] use mutex instead of binary semaphore in FORE Systems 200E-series driver for ATM
From: Matthias Kaehlcke <matthias.kaehlcke@...il.com>
(akpm: remove CVS control string too)
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@...il.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
drivers/atm/fore200e.c | 20 +++++++++-----------
drivers/atm/fore200e.h | 2 +-
2 files changed, 10 insertions(+), 12 deletions(-)
diff -puN drivers/atm/fore200e.c~use-mutex-instead-of-binary-semaphore-in-fore-systems-200e-series-driver-for-atm drivers/atm/fore200e.c
--- a/drivers/atm/fore200e.c~use-mutex-instead-of-binary-semaphore-in-fore-systems-200e-series-driver-for-atm
+++ a/drivers/atm/fore200e.c
@@ -1,6 +1,4 @@
/*
- $Id: fore200e.c,v 1.5 2000/04/14 10:10:34 davem Exp $
-
A FORE Systems 200E-series driver for ATM on Linux.
Christophe Lizzi (lizzi@...m.fr), October 1999-March 2003.
@@ -1502,9 +1500,9 @@ 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 +1511,7 @@ 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 +1597,9 @@ 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 +2062,16 @@ fore200e_change_qos(struct atm_vcc* vcc,
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 +2457,7 @@ fore200e_initialize(struct fore200e* for
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 -puN drivers/atm/fore200e.h~use-mutex-instead-of-binary-semaphore-in-fore-systems-200e-series-driver-for-atm drivers/atm/fore200e.h
--- a/drivers/atm/fore200e.h~use-mutex-instead-of-binary-semaphore-in-fore-systems-200e-series-driver-for-atm
+++ a/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 */
_
-
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