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Commit 25c61a1f authored by Cornelia Huck's avatar Cornelia Huck Committed by Heiko Carstens
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[S390] cio: Device status validity. 



Only accumulate device status field in irb if it is valid.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent b70842df

drivers/s390/cio/device_status.c

+5 −1
Original line number Diff line number Diff line
@@ -263,6 +263,10 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb) 
		cdev_irb->scsw.cpa = irb->scsw.cpa;

	/* Accumulate device status, but not the device busy flag. */

	cdev_irb->scsw.dstat &= ~DEV_STAT_BUSY;

	/* dstat is not always valid. */

	if (irb->scsw.stctl &

	    (SCSW_STCTL_PRIM_STATUS | SCSW_STCTL_SEC_STATUS

	     | SCSW_STCTL_INTER_STATUS | SCSW_STCTL_ALERT_STATUS))

		cdev_irb->scsw.dstat |= irb->scsw.dstat;

	/* Accumulate subchannel status. */

	cdev_irb->scsw.cstat |= irb->scsw.cstat;