aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/cio/chsc.c
diff options
context:
space:
mode:
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/chsc.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/chsc.c')
-rw-r--r--drivers/s390/cio/chsc.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 9d92540bd99..11900de94cb 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -744,20 +744,22 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
device_trigger_reprobe(sch);
else if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- } else {
- sch->opm &= ~(0x80 >> chp);
- sch->lpm &= ~(0x80 >> chp);
- if (check_for_io_on_path(sch, chp))
- /* Path verification is done after killing. */
- device_kill_io(sch);
- else if (!sch->lpm) {
+ break;
+ }
+ sch->opm &= ~(0x80 >> chp);
+ sch->lpm &= ~(0x80 >> chp);
+ if (check_for_io_on_path(sch, chp))
+ /* Path verification is done after killing. */
+ device_kill_io(sch);
+ else if (!sch->lpm) {
+ if (device_trigger_verify(sch) != 0) {
if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
need_rescan = 1;
}
- } else if (sch->driver && sch->driver->verify)
- sch->driver->verify(&sch->dev);
- }
+ }
+ } else if (sch->driver && sch->driver->verify)
+ sch->driver->verify(&sch->dev);
break;
}
spin_unlock_irqrestore(&sch->lock, flags);