[SCSI] sem2mutex 3w-[x9]xxx

Convert a the 3w-9xxx.c and 3w-xxxx.c drivers to use mutexes instead
of semaphores. Untested, but compiles and looks obviously correct.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/3w-9xxx.c

@@ -73,6 +73,7 @@
 #include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
@@ -615,7 +616,7 @@ static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int
 	void __user *argp = (void __user *)arg;
 
 	/* Only let one of these through at a time */
-	if (down_interruptible(&tw_dev->ioctl_sem)) {
+	if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
 		retval = TW_IOCTL_ERROR_OS_EINTR;
 		goto out;
 	}
@@ -852,7 +853,7 @@ out3:
 	/* Now free ioctl buf memory */
 	dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
 out2:
-	up(&tw_dev->ioctl_sem);
+	mutex_unlock(&tw_dev->ioctl_lock);
 out:
 	return retval;
 } /* End twa_chrdev_ioctl() */
@@ -1182,7 +1183,7 @@ static int twa_initialize_device_extension(TW_Device_Extension *tw_dev)
 	tw_dev->error_sequence_id = 1;
 	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
 
-	init_MUTEX(&tw_dev->ioctl_sem);
+	mutex_init(&tw_dev->ioctl_lock);
 	init_waitqueue_head(&tw_dev->ioctl_wqueue);
 
 	retval = 0;

drivers/scsi/3w-9xxx.h

@@ -672,7 +672,7 @@ typedef struct TAG_TW_Device_Extension {
 	u32                     ioctl_msec;
 	int			chrdev_request_id;
 	wait_queue_head_t	ioctl_wqueue;
-	struct semaphore	ioctl_sem;
+	struct mutex		ioctl_lock;
 	char			aen_clobber;
 	unsigned short		working_srl;
 	unsigned short		working_branch;

drivers/scsi/3w-xxxx.c

@@ -203,6 +203,7 @@
 #include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
@@ -888,7 +889,7 @@ static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int
 	dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
 
 	/* Only let one of these through at a time */
-	if (down_interruptible(&tw_dev->ioctl_sem))
+	if (mutex_lock_interruptible(&tw_dev->ioctl_lock))
 		return -EINTR;
 
 	/* First copy down the buffer length */
@@ -1029,7 +1030,7 @@ out2:
 	/* Now free ioctl buf memory */
 	dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, cpu_addr, dma_handle);
 out:
-	up(&tw_dev->ioctl_sem);
+	mutex_unlock(&tw_dev->ioctl_lock);
 	return retval;
 } /* End tw_chrdev_ioctl() */
 
@@ -1270,7 +1271,7 @@ static int tw_initialize_device_extension(TW_Device_Extension *tw_dev)
 	tw_dev->pending_tail = TW_Q_START;
 	tw_dev->chrdev_request_id = TW_IOCTL_CHRDEV_FREE;
 
-	init_MUTEX(&tw_dev->ioctl_sem);
+	mutex_init(&tw_dev->ioctl_lock);
 	init_waitqueue_head(&tw_dev->ioctl_wqueue);
 
 	return 0;

drivers/scsi/3w-xxxx.h

@@ -420,7 +420,7 @@ typedef struct TAG_TW_Device_Extension {
 	u32			max_sector_count;
 	u32			aen_count;
 	struct Scsi_Host	*host;
-	struct semaphore	ioctl_sem;
+	struct mutex		ioctl_lock;
 	unsigned short		aen_queue[TW_Q_LENGTH];
 	unsigned char		aen_head;
 	unsigned char		aen_tail;