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[IRDA]: use mutex instead of semaphore in VLSI 82C147 IrDA controller driver

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The VLSI 82C147 IrDA controller driver uses a semaphore as mutex.  Use the
mutex API instead of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matthias Kaehlcke 2007-07-09 13:18:12 -07:00 committed by David S. Miller
parent 6f11df8355
commit aa4291108f
2 changed files with 15 additions and 14 deletions
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27
drivers/net/irda/vlsi_ir.c
View File

@ -44,6 +44,7 @@ MODULE_LICENSE("GPL");
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
@ -1660,8 +1661,8 @@ vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
idev = ndev->priv;
spin_lock_init(&idev->lock);
init_MUTEX(&idev->sem);
down(&idev->sem);
mutex_init(&idev->mtx);
mutex_lock(&idev->mtx);
idev->pdev = pdev;
if (vlsi_irda_init(ndev) < 0)
@ -1689,12 +1690,12 @@ vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name);
pci_set_drvdata(pdev, ndev);
up(&idev->sem);
mutex_unlock(&idev->mtx);
return 0;
out_freedev:
up(&idev->sem);
mutex_unlock(&idev->mtx);
free_netdev(ndev);
out_disable:
pci_disable_device(pdev);
@ -1716,12 +1717,12 @@ static void __devexit vlsi_irda_remove(struct pci_dev *pdev)
unregister_netdev(ndev);
idev = ndev->priv;
down(&idev->sem);
mutex_lock(&idev->mtx);
if (idev->proc_entry) {
remove_proc_entry(ndev->name, vlsi_proc_root);
idev->proc_entry = NULL;
}
up(&idev->sem);
mutex_unlock(&idev->mtx);
free_netdev(ndev);
@ -1751,7 +1752,7 @@ static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
return 0;
}
idev = ndev->priv;
down(&idev->sem);
mutex_lock(&idev->mtx);
if (pdev->current_state != 0) { /* already suspended */
if (state.event > pdev->current_state) { /* simply go deeper */
pci_set_power_state(pdev, pci_choose_state(pdev, state));
@ -1759,7 +1760,7 @@ static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
}
else
IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __FUNCTION__, pci_name(pdev), pdev->current_state, state.event);
up(&idev->sem);
mutex_unlock(&idev->mtx);
return 0;
}
@ -1775,7 +1776,7 @@ static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
pci_set_power_state(pdev, pci_choose_state(pdev, state));
pdev->current_state = state.event;
idev->resume_ok = 1;
up(&idev->sem);
mutex_unlock(&idev->mtx);
return 0;
}
@ -1790,9 +1791,9 @@ static int vlsi_irda_resume(struct pci_dev *pdev)
return 0;
}
idev = ndev->priv;
down(&idev->sem);
mutex_lock(&idev->mtx);
if (pdev->current_state == 0) {
up(&idev->sem);
mutex_unlock(&idev->mtx);
IRDA_WARNING("%s - %s: already resumed\n",
__FUNCTION__, pci_name(pdev));
return 0;
@ -1814,7 +1815,7 @@ static int vlsi_irda_resume(struct pci_dev *pdev)
* device and independently resume_ok should catch any garbage config.
*/
IRDA_WARNING("%s - hm, nothing to resume?\n", __FUNCTION__);
up(&idev->sem);
mutex_unlock(&idev->mtx);
return 0;
}
@ -1824,7 +1825,7 @@ static int vlsi_irda_resume(struct pci_dev *pdev)
netif_device_attach(ndev);
}
idev->resume_ok = 0;
up(&idev->sem);
mutex_unlock(&idev->mtx);
return 0;
}

2
drivers/net/irda/vlsi_ir.h
View File

@ -728,7 +728,7 @@ typedef struct vlsi_irda_dev {
struct timeval last_rx;
spinlock_t lock;
struct semaphore sem;
struct mutex mtx;
u8 resume_ok;
struct proc_dir_entry *proc_entry;