[patch 4/8] use mutex instead of semaphore in VLSI 82C147 IrDA controller driver

[akpm]

From: Matthias Kaehlcke <[EMAIL PROTECTED]>

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 <[EMAIL PROTECTED]>
Cc: Samuel Ortiz <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---

 drivers/net/irda/vlsi_ir.c |   27 ++++++++++++++-------------
 drivers/net/irda/vlsi_ir.h |    2 +-
 2 files changed, 15 insertions(+), 14 deletions(-)

diff -puN 
drivers/net/irda/vlsi_ir.c~use-mutex-instead-of-semaphore-in-vlsi-82c147-irda-controller-driver
 drivers/net/irda/vlsi_ir.c
--- 
a/drivers/net/irda/vlsi_ir.c~use-mutex-instead-of-semaphore-in-vlsi-82c147-irda-controller-driver
+++ a/drivers/net/irda/vlsi_ir.c
@@ -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, co
        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, co
        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(s
        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_
                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_
                }
                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_
        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_d
                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_d
                 * 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_d
                netif_device_attach(ndev);
        }
        idev->resume_ok = 0;
-       up(&idev->sem);
+       mutex_unlock(&idev->mtx);
        return 0;
 }
 
diff -puN 
drivers/net/irda/vlsi_ir.h~use-mutex-instead-of-semaphore-in-vlsi-82c147-irda-controller-driver
 drivers/net/irda/vlsi_ir.h
--- 
a/drivers/net/irda/vlsi_ir.h~use-mutex-instead-of-semaphore-in-vlsi-82c147-irda-controller-driver
+++ a/drivers/net/irda/vlsi_ir.h
@@ -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;
_
-
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