From: Peter Oberparleiter <[email protected]>
[S390] cio long busy in read configuration data.
Trying to set a DASD root device online can fail under some circumstances
with the message "Read configuration data returned error -5". The cause
is that read configuration data incorrectly aborts with -EIO when it
encounters a temporary busy condition at a storage server.
Perform retry when encountering temporary busy conditions.
Signed-off-by: Peter Oberparleiter <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---
drivers/s390/cio/device_ops.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/drivers/s390/cio/device_ops.c linux-2.6-patched/drivers/s390/cio/device_ops.c
--- linux-2.6/drivers/s390/cio/device_ops.c 2006-06-14 14:29:18.000000000 +0200
+++ linux-2.6-patched/drivers/s390/cio/device_ops.c 2006-06-14 14:29:35.000000000 +0200
@@ -270,7 +270,8 @@ ccw_device_wake_up(struct ccw_device *cd
* We didn't get channel end / device end. Check if path
* verification has been started; we can retry after it has
* finished. We also retry unit checks except for command reject
- * or intervention required.
+ * or intervention required. Also check for long busy
+ * conditions.
*/
if (cdev->private->flags.doverify ||
cdev->private->state == DEV_STATE_VERIFY)
@@ -279,6 +280,10 @@ ccw_device_wake_up(struct ccw_device *cd
!(irb->ecw[0] &
(SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
cdev->private->intparm = -EAGAIN;
+ else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
+ (irb->scsw.dstat & DEV_STAT_DEV_END) &&
+ (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
+ cdev->private->intparm = -EAGAIN;
else
cdev->private->intparm = -EIO;
-
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