[S390] retry after deferred condition code.

Do a retry of read device characteristics / read configuration
data when a deferred condition code 1 is encountered in
ccw_device_wake_up().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index a60124264bee..9e3de0bd59b5 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -263,6 +263,9 @@ ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
         /* Abuse intparm for error reporting. */
         if (IS_ERR(irb))
                 cdev->private->intparm = -EIO;
+        else if (irb->scsw.cc == 1)
+                /* Retry for deferred condition code. */
+                cdev->private->intparm = -EAGAIN;
         else if ((irb->scsw.dstat !=
                   (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
                  (irb->scsw.cstat != 0)) {