summaryrefslogtreecommitdiffstats
path: root/drivers/s390/cio/css.c
diff options
context:
space:
mode:
authorSebastian Ott <sebott@linux.vnet.ibm.com>2012-10-15 12:24:56 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-10-18 17:50:08 +0200
commitcec8546638dc634824b629e33968d6c68f8b07d6 (patch)
treeeb97150bedd22afb3ee503e6b6bf159a65fc8ee8 /drivers/s390/cio/css.c
parentaa92b33c6b93b5ef4ccbaa72afa9c387a96c2ee2 (diff)
downloadop-kernel-dev-cec8546638dc634824b629e33968d6c68f8b07d6.zip
op-kernel-dev-cec8546638dc634824b629e33968d6c68f8b07d6.tar.gz
s390/css: stop stsch loop after cc 3
Receiving cc=3 from store subchannel means 2 things: * the subchannel is not provided * there are no further subchannels in this subchannel set With this patch we abort the store subchannel loop after cc=3 (or an exception) and clear the subsequent bits in the subchannel id set. Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/css.c')
-rw-r--r--drivers/s390/cio/css.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index b4d572f..fd00afd 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -377,7 +377,11 @@ static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow)
/* Will be done on the slow path. */
return -EAGAIN;
}
- if (stsch_err(schid, &schib) || !css_sch_is_valid(&schib)) {
+ if (stsch_err(schid, &schib)) {
+ /* Subchannel is not provided. */
+ return -ENXIO;
+ }
+ if (!css_sch_is_valid(&schib)) {
/* Unusable - ignore. */
return 0;
}
@@ -536,6 +540,7 @@ static int slow_eval_unknown_fn(struct subchannel_id schid, void *data)
case -ENOMEM:
case -EIO:
/* These should abort looping */
+ idset_sch_del_subseq(slow_subchannel_set, schid);
break;
default:
rc = 0;
OpenPOWER on IntegriCloud