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authorCornelia Huck <cornelia.huck@de.ibm.com>2006-12-04 15:41:01 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-12-04 15:41:01 +0100
commit24cb5b4846ebae5543869b5c596c2650f380df53 (patch)
treefd45cf7fab0a065c7529c5811e3258a66e877095 /drivers/s390/cio/device_fsm.c
parent9163bb2e556f6c7879961df94540f0879db4717b (diff)
[S390] cio: Use path verification for last path gone after vary off.
If the last path to a device is gone after a chpid has been varied off, putting it on the slow queue doesn't prevent a device driver from still attempting to use it (it may stay on the slow queue for a long time). Instead, trigger a verify event which will prevent I/O attempts from the device driver immediately. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_fsm.c')
-rw-r--r--drivers/s390/cio/device_fsm.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index de3d0857db9f..7665000e8dfe 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -59,6 +59,17 @@ device_set_disconnected(struct subchannel *sch)
cdev->private->state = DEV_STATE_DISCONNECTED;
}
+int device_trigger_verify(struct subchannel *sch)
+{
+ struct ccw_device *cdev;
+
+ cdev = sch->dev.driver_data;
+ if (!cdev || !cdev->online)
+ return -EINVAL;
+ dev_fsm_event(cdev, DEV_EVENT_VERIFY);
+ return 0;
+}
+
/*
* Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
*/