scsi_sysfs: Fix queue_ramp_up_period return code

commit 863e02d0e173bb9d8cea6861be22820b25c076cc upstream.

Writing a number to /sys/bus/scsi/devices/<sdev>/queue_ramp_up_period
returns the value of that number instead of the number of bytes written.
This behavior can confuse programs expecting POSIX write() semantics.
Fix this by returning the number of bytes written instead.

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index fee7d1aebc3e8f9221c4093e6963de16644d03f3..7e78015d6ab78f43af86c3c3dc61825a505c5aae 100644 (file)
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -891,7 +891,7 @@ sdev_store_queue_ramp_up_period(struct device *dev,
                return -EINVAL;
 
        sdev->queue_ramp_up_period = msecs_to_jiffies(period);
-       return period;
+       return count;
 }
 
 static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,