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Commit 7e7a2d07 authored by Matthias Kaehlcke's avatar Matthias Kaehlcke Committed by David S. Miller
Browse files

[ATM]: Use mutex instead of binary semaphore in idt77252 driver. 



Use mutex instead of binary semaphore in idt77252 driver.

Signed-off-by: default avatarMatthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bbb711e6

drivers/atm/idt77252.c

+14 −13
Original line number Diff line number Diff line
@@ -47,7 +47,8 @@ static char const rcsid[] = 
#include <linux/bitops.h>

#include <linux/wait.h>

#include <linux/jiffies.h>

#include <asm/semaphore.h>

#include <linux/mutex.h>



#include <asm/io.h>

#include <asm/uaccess.h>

#include <asm/atomic.h>
@@ -2435,7 +2436,7 @@ idt77252_open(struct atm_vcc *vcc) 


	set_bit(ATM_VF_ADDR, &vcc->flags);



	down(&card->mutex);

	mutex_lock(&card->mutex);



	OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
@@ -2446,7 +2447,7 @@ idt77252_open(struct atm_vcc *vcc) 
		break;

	default:

		printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);

		up(&card->mutex);

		mutex_unlock(&card->mutex);

		return -EPROTONOSUPPORT;

	}
@@ -2455,7 +2456,7 @@ idt77252_open(struct atm_vcc *vcc) 
		card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);

		if (!card->vcs[index]) {

			printk("%s: can't alloc vc in open()\n", card->name);

			up(&card->mutex);

			mutex_unlock(&card->mutex);

			return -ENOMEM;

		}

		card->vcs[index]->card = card;
@@ -2484,14 +2485,14 @@ idt77252_open(struct atm_vcc *vcc) 
	if (inuse) {

		printk("%s: %s vci already in use.\n", card->name,

		       inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");

		up(&card->mutex);

		mutex_unlock(&card->mutex);

		return -EADDRINUSE;

	}



	if (vcc->qos.txtp.traffic_class != ATM_NONE) {

		error = idt77252_init_tx(card, vc, vcc, &vcc->qos);

		if (error) {

			up(&card->mutex);

			mutex_unlock(&card->mutex);

			return error;

		}

	}
@@ -2499,14 +2500,14 @@ idt77252_open(struct atm_vcc *vcc) 
	if (vcc->qos.rxtp.traffic_class != ATM_NONE) {

		error = idt77252_init_rx(card, vc, vcc, &vcc->qos);

		if (error) {

			up(&card->mutex);

			mutex_unlock(&card->mutex);

			return error;

		}

	}



	set_bit(ATM_VF_READY, &vcc->flags);



	up(&card->mutex);

	mutex_unlock(&card->mutex);

	return 0;

}
@@ -2520,7 +2521,7 @@ idt77252_close(struct atm_vcc *vcc) 
	unsigned long addr;

	unsigned long timeout;



	down(&card->mutex);

	mutex_lock(&card->mutex);



	IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",

		card->name, vc->index, vcc->vpi, vcc->vci);
@@ -2591,7 +2592,7 @@ done: 
		free_scq(card, vc->scq);

	}



	up(&card->mutex);

	mutex_unlock(&card->mutex);

}



static int
@@ -2602,7 +2603,7 @@ idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags) 
	struct vc_map *vc = vcc->dev_data;

	int error = 0;



	down(&card->mutex);

	mutex_lock(&card->mutex);



	if (qos->txtp.traffic_class != ATM_NONE) {

	    	if (!test_bit(VCF_TX, &vc->flags)) {
@@ -2648,7 +2649,7 @@ idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags) 
	set_bit(ATM_VF_HASQOS, &vcc->flags);



out:

	up(&card->mutex);

	mutex_unlock(&card->mutex);

	return error;

}
@@ -3709,7 +3710,7 @@ idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id) 
	membase = pci_resource_start(pcidev, 1);

	srambase = pci_resource_start(pcidev, 2);



	init_MUTEX(&card->mutex);

	mutex_init(&card->mutex);

	spin_lock_init(&card->cmd_lock);

	spin_lock_init(&card->tst_lock);

drivers/atm/idt77252.h

+2 −2
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ 
#include <linux/ptrace.h>

#include <linux/skbuff.h>

#include <linux/workqueue.h>



#include <linux/mutex.h>



/*****************************************************************************/

/*                                                                           */
@@ -359,7 +359,7 @@ struct idt77252_dev 
	unsigned long		srambase;	/* SAR's sram  base address */

	void __iomem		*fbq[4];	/* FBQ fill addresses */



	struct semaphore	mutex;

	struct mutex		mutex;

	spinlock_t		cmd_lock;	/* for r/w utility/sram */



	unsigned long		softstat;