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atm: ambassador: vcc_sf semaphore to mutex

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Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Walker 2008-04-29 03:39:29 -07:00 committed by David S. Miller
parent 220fc3fc60
commit eff0dee546
2 changed files with 11 additions and 10 deletions
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19
drivers/atm/ambassador.c
View File

@ -33,6 +33,7 @@
#include <linux/interrupt.h>
#include <linux/poison.h>
#include <linux/bitrev.h>
#include <linux/mutex.h>
#include <asm/atomic.h>
#include <asm/io.h>
@ -1177,7 +1178,7 @@ static int amb_open (struct atm_vcc * atm_vcc)
vcc->tx_frame_bits = tx_frame_bits;
down (&dev->vcc_sf);
mutex_lock(&dev->vcc_sf);
if (dev->rxer[vci]) {
// RXer on the channel already, just modify rate...
cmd.request = cpu_to_be32 (SRB_MODIFY_VC_RATE);
@ -1203,7 +1204,7 @@ static int amb_open (struct atm_vcc * atm_vcc)
schedule();
}
dev->txer[vci].tx_present = 1;
up (&dev->vcc_sf);
mutex_unlock(&dev->vcc_sf);
}
if (rxtp->traffic_class != ATM_NONE) {
@ -1211,7 +1212,7 @@ static int amb_open (struct atm_vcc * atm_vcc)
vcc->rx_info.pool = pool;
down (&dev->vcc_sf);
mutex_lock(&dev->vcc_sf);
/* grow RX buffer pool */
if (!dev->rxq[pool].buffers_wanted)
dev->rxq[pool].buffers_wanted = rx_lats;
@ -1237,7 +1238,7 @@ static int amb_open (struct atm_vcc * atm_vcc)
schedule();
// this link allows RX frames through
dev->rxer[vci] = atm_vcc;
up (&dev->vcc_sf);
mutex_unlock(&dev->vcc_sf);
}
// indicate readiness
@ -1262,7 +1263,7 @@ static void amb_close (struct atm_vcc * atm_vcc) {
if (atm_vcc->qos.txtp.traffic_class != ATM_NONE) {
command cmd;
down (&dev->vcc_sf);
mutex_lock(&dev->vcc_sf);
if (dev->rxer[vci]) {
// RXer still on the channel, just modify rate... XXX not really needed
cmd.request = cpu_to_be32 (SRB_MODIFY_VC_RATE);
@ -1277,7 +1278,7 @@ static void amb_close (struct atm_vcc * atm_vcc) {
dev->txer[vci].tx_present = 0;
while (command_do (dev, &cmd))
schedule();
up (&dev->vcc_sf);
mutex_unlock(&dev->vcc_sf);
}
// disable RXing
@ -1287,7 +1288,7 @@ static void amb_close (struct atm_vcc * atm_vcc) {
// this is (the?) one reason why we need the amb_vcc struct
unsigned char pool = vcc->rx_info.pool;
down (&dev->vcc_sf);
mutex_lock(&dev->vcc_sf);
if (dev->txer[vci].tx_present) {
// TXer still on the channel, just go to pool zero XXX not really needed
cmd.request = cpu_to_be32 (SRB_MODIFY_VC_FLAGS);
@ -1314,7 +1315,7 @@ static void amb_close (struct atm_vcc * atm_vcc) {
dev->rxq[pool].buffers_wanted = 0;
drain_rx_pool (dev, pool);
}
up (&dev->vcc_sf);
mutex_unlock(&dev->vcc_sf);
}
// free our structure
@ -2188,7 +2189,7 @@ static void setup_dev(amb_dev *dev, struct pci_dev *pci_dev)
// semaphore for txer/rxer modifications - we cannot use a
// spinlock as the critical region needs to switch processes
init_MUTEX (&dev->vcc_sf);
mutex_init(&dev->vcc_sf);
// queue manipulation spinlocks; we want atomic reads and
// writes to the queue descriptors (handles IRQ and SMP)
// consider replacing "int pending" -> "atomic_t available"

2
drivers/atm/ambassador.h
View File

@ -638,7 +638,7 @@ struct amb_dev {
amb_txq txq;
amb_rxq rxq[NUM_RX_POOLS];
struct semaphore vcc_sf;
struct mutex vcc_sf;
amb_tx_info txer[NUM_VCS];
struct atm_vcc * rxer[NUM_VCS];
unsigned int tx_avail;