lkml.org 
[lkml]   [2006]   [Jun]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 4/24] s390: cio long busy in read configuration data.
From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

[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 <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

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;

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-06-14 16:01    [W:0.223 / U:0.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site