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Commit da039bd1 authored by Peter Oberparleiter's avatar Peter Oberparleiter Committed by Martin Schwidefsky
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[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: default avatarPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent d7d23702

drivers/s390/cio/device_ops.c

+6 −1
Original line number Diff line number Diff line
@@ -270,7 +270,8 @@ ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb) 
		 * 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 *cdev, unsigned long ip, struct irb *irb) 
		     !(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;