From: Horst Hummel <horst.hummel@de.ibm.com>

The IOCTL BIODASDPRRD had no return code for 'profiling is inactive' and
therefore tunedasd wrote misleading message for request-counter = 0. 
Introduce return-code EIO for inactive profiling.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/s390/block/dasd_ioctl.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletion(-)

diff -puN drivers/s390/block/dasd_ioctl.c~s390-biodasdprrd-ioctl-return-code drivers/s390/block/dasd_ioctl.c
--- devel/drivers/s390/block/dasd_ioctl.c~s390-biodasdprrd-ioctl-return-code	2005-12-09 23:47:36.000000000 -0800
+++ devel-akpm/drivers/s390/block/dasd_ioctl.c	2005-12-09 23:47:36.000000000 -0800
@@ -7,7 +7,7 @@
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001
  *
- * $Revision: 1.47 $
+ * $Revision: 1.50 $
  *
  * i/o controls for the dasd driver.
  */
@@ -352,6 +352,9 @@ dasd_ioctl_read_profile(struct block_dev
 	if (device == NULL)
 		return -ENODEV;
 
+	if (dasd_profile_level == DASD_PROFILE_OFF)
+		return -EIO;
+
 	if (copy_to_user((long __user *) args, (long *) &device->profile,
 			 sizeof (struct dasd_profile_info_t)))
 		return -EFAULT;
_