use mutex instead of semaphore in several drivers

index 26e1e6c..fef9ac9 100644
@@ -21,6 +21,7 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/blkdev.h>

index 04d0b69..2cecc64 100644
@@ -3957,7 +3957,7 @@ megaraid_sysfs_alloc_resources(adapter_t *adapter)
 		megaraid_sysfs_free_resources(adapter);
 	}
 
-	sema_init(&raid_dev->sysfs_sem, 1);
+	mutex_init(&raid_dev->sysfs_mtx);
 
 	init_waitqueue_head(&raid_dev->sysfs_wait_q);
 

@@ -4058,7 +4058,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter)
 	/*
 	 * Allow only one read at a time to go through the sysfs attributes
 	 */
-	down(&raid_dev->sysfs_sem);
+	mutex_lock(&raid_dev->sysfs_mtx);
 
 	uioc	= raid_dev->sysfs_uioc;
 	mbox64	= raid_dev->sysfs_mbox64;

@@ -4134,7 +4134,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter)
 
 	del_timer_sync(timerp);
 
-	up(&raid_dev->sysfs_sem);
+	mutex_unlock(&raid_dev->sysfs_mtx);
 
 	return rval;
 }

index 9de803c..626459d 100644
@@ -168,7 +168,7 @@ typedef struct {
  * @hw_error			: set if FW not responding
  * @fast_load			: If set, skip physical device scanning
  * @channel_class		: channel class, RAID or SCSI
- * @sysfs_sem			: semaphore to serialize access to sysfs res.
+ * @sysfs_mtx			: mutex to serialize access to sysfs res.
  * @sysfs_uioc			: management packet to issue FW calls from sysfs
  * @sysfs_mbox64		: mailbox packet to issue FW calls from sysfs
  * @sysfs_buffer		: data buffer for FW commands issued from sysfs

@@ -208,7 +208,7 @@ typedef struct {
 	int				hw_error;
 	int				fast_load;
 	uint8_t				channel_class;
-	struct semaphore		sysfs_sem;
+	struct mutex			sysfs_mtx;
 	uioc_t				*sysfs_uioc;
 	mbox64_t			*sysfs_mbox64;
 	caddr_t				sysfs_buffer;

@@ -21,6 +21,7 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/blkdev.h>

@@ -3957,7 +3957,7 @@ megaraid_sysfs_alloc_resources(adapter_t *adapter)
 		megaraid_sysfs_free_resources(adapter);
 	}
 
-	sema_init(&raid_dev->sysfs_sem, 1);
+	mutex_init(&raid_dev->sysfs_mtx);
 
 	init_waitqueue_head(&raid_dev->sysfs_wait_q);
 

@@ -4058,7 +4058,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter)
 	/*
 	 * Allow only one read at a time to go through the sysfs

@@ -168,7 +168,7 @@ typedef struct {
  * @hw_error			: set if FW not responding
  * @fast_load			: If set, skip physical device scanning
  * @channel_class		: channel class, RAID or SCSI
- * @sysfs_sem			: semaphore to serialize access to sysfs

index 085332a..9c0e8d1 100644
@@ -1099,7 +1099,7 @@ static int pwc_video_open(struct inode *inode, struct file *file)
 		return -EBUSY;
 	}
 
-	down(&pdev->modlock);
+	mutex_lock(&pdev->modlock);
 	if (!pdev->usb_init) {
 		PWC_DEBUG_OPEN("Doing first time initialization.\n");
 		pdev->usb_init = 1;

@@ -1131,7 +1131,7 @@ static int pwc_video_open(struct inode *inode, struct file *file)
 	if (i < 0) {
 		PWC_DEBUG_OPEN("Failed to allocate buffers memory.\n");
 		pwc_free_buffers(pdev);
-		up(&pdev->modlock);
+		mutex_unlock(&pdev->modlock);
 		return i;
 	}
 

@@ -1172,7 +1172,7 @@ static int pwc_video_open(struct inode *inode, struct file *file)
 	if (i) {
 		PWC_DEBUG_OPEN("Second attempt at set_video_mode failed.\n");
 		pwc_free_buffers(pdev);
-		up(&pdev->modlock);
+		mutex_unlock(&pdev->modlock);
 		return i;
 	}
 

@@ -1181,7 +1181,7 @@ static int pwc_video_open(struct inode *inode, struct file *file)
 		PWC_DEBUG_OPEN("Failed to init ISOC stuff = %d.\n", i);
 		pwc_isoc_cleanup(pdev);
 		pwc_free_buffers(pdev);
-		up(&pdev->modlock);
+		mutex_unlock(&pdev->modlock);
 		return i;
 	}
 

@@ -1191,7 +1191,7 @@ static int pwc_video_open(struct inode *inode, struct file *file)
 
 	pdev->vopen++;
 	file->private_data = vdev;
-	up(&pdev->modlock);
+	mutex_unlock(&pdev->modlock);
 	PWC_DEBUG_OPEN("<< video_open() returns 0.\n");
 	return 0;
 }

@@ -1685,7 +1685,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 		pdev->angle_range.tilt_max =  2500;
 	}
 
-	init_MUTEX(&pdev->modlock);
+	mutex_init(&pdev->modlock);
 	spin_lock_init(&pdev->ptrlock);
 
 	pdev->udev = udev;

index acbb931..910a04f 100644
@@ -31,7 +31,7 @@
 #include <linux/wait.h>
 #include <linux/smp_lock.h>
 #include <linux/version.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 #include <asm/errno.h>
 #include <linux/videodev.h>
 #include <media/v4l2-common.h>

@@ -244,7 +244,7 @@ struct pwc_device
    int image_read_pos;			/* In case we read data in pieces, keep track of were we are in the imagebuffer */
    int image_used[MAX_IMAGES];		/* For MCAPTURE and SYNC */
 
-   struct semaphore modlock;		/* to prevent races in video_open(), etc */
+   struct mutex modlock;		/* to prevent races in video_open(), etc */
    spinlock_t ptrlock;			/* for manipulating the buffer pointers */
 
    /*** motorized pan/tilt feature */

index a012f39..7c5cfa2 100644
@@ -31,6 +31,7 @@
 #include <linux/hwmon-vid.h>
 #include <linux/err.h>
 #include <linux/sysfs.h>
+#include <linux/mutex.h>
 
 /* Addresses to scan */
 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };

@@ -97,7 +98,7 @@ static inline int TEMP_FROM_REG(s8 val)
 struct smsc47m192_data {
 	struct i2c_client client;
 	struct class_device *class_dev;
-	struct semaphore update_lock;
+	struct mutex update_lock;
 	char valid;		/* !=0 if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
 

@@ -164,11 +165,11 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 	struct smsc47m192_data *data = i2c_get_clientdata(client);
 	unsigned long val = simple_strtoul(buf, NULL, 10);
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 	data->in_min[nr] = IN_TO_REG(val, nr);
 	i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
 							data->in_min[nr]);
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 	return count;
 }
 

@@ -181,11 +182,11 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 	struct smsc47m192_data *data = i2c_get_clientdata(client);
 	unsigned long val = simple_strtoul(buf, NULL, 10);
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 	data->in_max[nr] = IN_TO_REG(val, nr);
 	i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
 							data->in_max[nr]);
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 	return count;
 }
 

@@ -243,11 +244,11 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 	struct smsc47m192_data *data = i2c_get_clientdata(client);
 	long val = simple_strtol(buf, NULL, 10);
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 	data->temp_min[nr] = TEMP_TO_REG(val);
 	i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
 						data->temp_min[nr]);
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 	return count;
 }
 

@@ -260,11 +261,11 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 	struct smsc47m192_data *data = i2c_get_clientdata(client);
 	long val = simple_strtol(buf, NULL, 10);
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 	data->temp_max[nr] = TEMP_TO_REG(val);
 	i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
 						data->temp_max[nr]);
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 	return count;
 }
 

@@ -287,7 +288,7 @@ static ssize_t set_temp_offset(struct device *dev, struct device_attribute
 	u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
 	long val = simple_strtol(buf, NULL, 10);
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 	data->temp_offset[nr] = TEMP_TO_REG(val);
 	if (nr>1)
 		i2c_smbus_write_byte_data(client,

@@ -303,7 +304,7 @@ static ssize_t set_temp_offset(struct device *dev, struct device_attribute
 	} else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
 		i2c_smbus_write_byte_data(client,
 					SMSC47M192_REG_TEMP_OFFSET(nr), 0);
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 	return count;
 }
 

@@ -531,7 +532,7 @@ static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
 	/* Fill in the remaining client fields and put into the global list */
 	strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
 	data->vrm = vid_which_vrm();
-	init_MUTEX(&data->update_lock);
+	mutex_init(&data->update_lock);
 
 	/* Tell the I2C layer a new client has arrived */
 	if ((err = i2c_attach_client(client)))

@@ -594,7 +595,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
 	struct smsc47m192_data *data = i2c_get_clientdata(client);
 	int i, config;
 
-	down(&data->update_lock);
+	mutex_lock(&data->update_lock);
 
 	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 	 || !data->valid) {

@@ -645,7 +646,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
 		data->valid = 1;
 	}
 
-	up(&data->update_lock);
+	mutex_unlock(&data->update_lock);
 
 	return data;
 }

index f7e1d19..e86f4cd 100644
@@ -25,6 +25,7 @@
 #include <linux/pci.h>
 #include <linux/random.h>
 #include <linux/version.h>
+#include <linux/mutex.h>
 #include <linux/videodev2.h>
 #include <linux/dma-mapping.h>
 #ifdef CONFIG_VIDEO_V4L1_COMPAT

@@ -168,7 +169,7 @@ static LIST_HEAD(vivi_devlist);
 struct vivi_dev {
 	struct list_head           vivi_devlist;
 
-	struct semaphore           lock;
+	struct mutex               lock;
 
 	int                        users;
 

@@ -892,16 +893,16 @@ static struct videobuf_queue_ops vivi_video_qops = {
 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 {
 	/* is it free? */
-	down(&dev->lock);
+	mutex_lock(&dev->lock);
 	if (dev->resources) {
 		/* no, someone else uses it */
-		up(&dev->lock);
+		mutex_unlock(&dev->lock);
 		return 0;
 	}
 	/* it's free, grab it */
 	dev->resources =1;
 	dprintk(1,"res: get\n");
-	up(&dev->lock);
+	mutex_unlock(&dev->lock);
 	return 1;
 }
 

@@ -912,10 +913,10 @@ static int res_locked(struct vivi_dev *dev)
 
 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 {
-	down(&dev->lock);
+	mutex_lock(&dev->lock);
 	dev->resources = 0;
 	dprintk(1,"res: put\n");
-	up(&dev->lock);
+	mutex_lock(&dev->lock);
 }
 
 /* ------------------------------------------------------------------

@@ -1422,7 +1423,7 @@ static int __init vivi_init(void)
 	init_waitqueue_head(&dev->vidq.wq);
 
 	/* initialize locks */
-	init_MUTEX(&dev->lock);
+	mutex_init(&dev->lock);
 
 	dev->vidq.timeout.function = vivi_vid_timeout;
 	dev->vidq.timeout.data     = (unsigned long)dev;

index bf78ef1..0538ca9 100644
@@ -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;
 }
 

index 2d3b773..ca12a60 100644
@@ -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;