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

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>

2 files changed, 15 insertions, 14 deletions

diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c
index bf78ef1120ad..0538ca9ce058 100644
--- a/drivers/net/irda/vlsi_ir.c
+++ b/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, 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;
 }
 
diff --git a/drivers/net/irda/vlsi_ir.h b/drivers/net/irda/vlsi_ir.h
index 2d3b773d8e35..ca12a6096419 100644
--- a/drivers/net/irda/vlsi_ir.h
+++ b/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;