From fe6173d9b33dba18ec462051750fb1b9abcd796d Mon Sep 17 00:00:00 2001
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Date: Thu, 17 Apr 2008 07:46:00 +0200
Subject: [PATCH] [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: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
---
drivers/s390/cio/device_ops.c | 9 ++++++++-
drivers/s390/cio/device_status.c | 6 +++++-
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index 49b58eb0fab8..a1718a0aa539 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -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;
}
diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c
index ebe0848cfe33..4764b9e00b9e 100644
--- a/drivers/s390/cio/device_status.c
+++ b/drivers/s390/cio/device_status.c
@@ -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;
}
/*
--
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