Commit fe6173d9 authored by Cornelia Huck's avatar Cornelia Huck Committed by Heiko Carstens
Browse files

[S390] cio: Trigger verification on device/path not operational. 



Currently, we don't do much on no path or no device situations during
normal user I/O, since we rely on reports regarding those events by
the machine. If we trigger a path verification to bring our device
state up-to-date, we (a) may recover from path failures earlier and
(b) better handle situations where the hardware/hypervisor doesn't
give us enough notifications.

Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent 22806dc1

drivers/s390/cio/device_ops.c

+8 −1
Original line number Diff line number Diff line
@@ -193,8 +193,15 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, 
			return -EACCES;

	}

	ret = cio_start_key (sch, cpa, lpm, key);

	if (ret == 0)

	switch (ret) {

	case 0:

		cdev->private->intparm = intparm;

		break;

	case -EACCES:

	case -ENODEV:

		dev_fsm_event(cdev, DEV_EVENT_VERIFY);

		break;

	}

	return ret;

}

drivers/s390/cio/device_status.c

+5 −1
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) 
{

	struct subchannel *sch;

	struct ccw1 *sense_ccw;

	int rc;



	sch = to_subchannel(cdev->dev.parent);
@@ -337,7 +338,10 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) 
	/* Reset internal retry indication. */

	cdev->private->flags.intretry = 0;



	return cio_start(sch, sense_ccw, 0xff);

	rc = cio_start(sch, sense_ccw, 0xff);

	if (rc == -ENODEV || rc == -EACCES)

		dev_fsm_event(cdev, DEV_EVENT_VERIFY);

	return rc;

}



/*