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>
diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index f0973a0..199bc67 100644
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -90,6 +90,14 @@
idset_del(set, schid.ssid, schid.sch_no);
}
+/* Clear ids starting from @schid up to end of subchannel set. */
+void idset_sch_del_subseq(struct idset *set, struct subchannel_id schid)
+{
+ int pos = schid.ssid * set->num_id + schid.sch_no;
+
+ bitmap_clear(set->bitmap, pos, set->num_id - schid.sch_no);
+}
+
int idset_sch_contains(struct idset *set, struct subchannel_id schid)
{
return idset_contains(set, schid.ssid, schid.sch_no);