[SCSI] megaraid: fix compiler warnings

The user ioctl mailbox can only support a 32 bit address for the
commands structure.  This is fine, since the area it's pointing to is
allocated with pci_alloc_consistent(), so it should be physically <
4GB.  Thus kill the ptr to u32 conversion warnings on 64 bit.

Signed-off-by: Martin J. Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: "Patro, Sumant" <Sumant.Patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/megaraid.c

@@ -3571,7 +3571,7 @@ megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
 			/*
 			 * The user passthru structure
 			 */
-			upthru = (mega_passthru __user *)MBOX(uioc)->xferaddr;
+			upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
 
 			/*
 			 * Copy in the user passthru here.
@@ -3623,7 +3623,7 @@ megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
 				/*
 				 * Get the user data
 				 */
-				if( copy_from_user(data, (char __user *)uxferaddr,
+				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
 							pthru->dataxferlen) ) {
 					rval = (-EFAULT);
 					goto freemem_and_return;
@@ -3649,7 +3649,7 @@ megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
 			 * Is data going up-stream
 			 */
 			if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
-				if( copy_to_user((char __user *)uxferaddr, data,
+				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
 							pthru->dataxferlen) ) {
 					rval = (-EFAULT);
 				}
@@ -3702,7 +3702,7 @@ freemem_and_return:
 				/*
 				 * Get the user data
 				 */
-				if( copy_from_user(data, (char __user *)uxferaddr,
+				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
 							uioc.xferlen) ) {
 
 					pci_free_consistent(pdev,
@@ -3742,7 +3742,7 @@ freemem_and_return:
 			 * Is data going up-stream
 			 */
 			if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
-				if( copy_to_user((char __user *)uxferaddr, data,
+				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
 							uioc.xferlen) ) {
 
 					rval = (-EFAULT);