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authorCornelia Huck <cornelia.huck@de.ibm.com>2006-06-29 15:03:35 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-06-29 15:03:35 +0200
commitb4f7b1ee577857aca467e6825122a3b29d6c3c0e (patch)
treebb17f4d6bea22b1d5a4c0a927c41f1ba782ef2ae /drivers/s390
parent3ee526841ba409f7b23f825f120772a79e7d7bd2 (diff)
downloadop-kernel-dev-b4f7b1ee577857aca467e6825122a3b29d6c3c0e.zip
op-kernel-dev-b4f7b1ee577857aca467e6825122a3b29d6c3c0e.tar.gz
[S390] cio chpid offline.
After setting a path to a dasd offline at the SE, I/O hangs on that dasd for 5 minutes, then continues. I/O for which an interrupt will not be reported after the channel path has been disabled was not terminated by the common I/O layer, causing the dasd MIH to hit after 5 minutes. Be more aggressive in terminating I/O after setting a channel path offline. Also make sure to generate a fake irb if the device driver issues an I/O request after being notified of the killed I/O and clear residual information from the irb before trying to start the delayed verification. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/chsc.c3
-rw-r--r--drivers/s390/cio/device_fsm.c2
-rw-r--r--drivers/s390/cio/device_ops.c3
3 files changed, 5 insertions, 3 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 4a9da5b..b00f3ed 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -244,8 +244,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
if ((sch->schib.scsw.actl & SCSW_ACTL_DEVACT) &&
(sch->schib.scsw.actl & SCSW_ACTL_SCHACT) &&
- (sch->schib.pmcw.lpum == mask) &&
- (sch->vpm == 0)) {
+ (sch->schib.pmcw.lpum == mask)) {
int cc;
cc = cio_clear(sch);
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 49ec562..5ec8ef1 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -861,6 +861,8 @@ ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
irb = (struct irb *) __LC_IRB;
/* Accumulate status. We don't do basic sense. */
ccw_device_accumulate_irb(cdev, irb);
+ /* Remember to clear irb to avoid residuals. */
+ memset(&cdev->private->irb, 0, sizeof(struct irb));
/* Try to start delayed device verification. */
ccw_device_online_verify(cdev, 0);
/* Note: Don't call handler for cio initiated clear! */
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 5c9904b..b266ad8 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -78,7 +78,8 @@ ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
- if (cdev->private->state == DEV_STATE_VERIFY) {
+ if (cdev->private->state == DEV_STATE_VERIFY ||
+ cdev->private->state == DEV_STATE_CLEAR_VERIFY) {
/* Remember to fake irb when finished. */
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = 1;
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