diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 3ff74f472249bb638a30933389b9046e75862633..31c4975422729d46a47802e975c58c0cc8d46f6a 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/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 @@ static int twa_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int
 	/* 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;
diff --git a/drivers/scsi/3w-9xxx.h b/drivers/scsi/3w-9xxx.h
index 46f22cdc82985d91bbad87fe3df4a0e8e090cc5d..1b16d57f0314b239d2833a49c063f26e18c6234f 100644
--- a/drivers/scsi/3w-9xxx.h
+++ b/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;
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index 283f6d25892b9c7d97dfd97fe3643ad12d7d0c47..25f678d0780b2e1bb2dcf12a767b8607739db150 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/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 @@ static int tw_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int
 	/* 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;
diff --git a/drivers/scsi/3w-xxxx.h b/drivers/scsi/3w-xxxx.h
index 4f81fc39ec57d7525a506021433aaefec0707702..31fe5ea159205bb15b861a615d39b7405679c728 100644
--- a/drivers/scsi/3w-xxxx.h
+++ b/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;