[S390] cio: Catch operand exceptions on stsch.

If we have a subchannel id which has been generated via
for_each_subchannel(), it might contain an invalid subchannel set id.
We need to catch the ensuing operand exception by using stsch_err()
instead of stsch() in all possible cases.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 15b0e63..514daea 100644 (file)
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -608,7 +608,7 @@ __chp_add_new_sch(struct subchannel_id schid)
        struct schib schib;
        int ret;
 
-       if (stsch(schid, &schib))
+       if (stsch_err(schid, &schib))
                /* We're through */
                return need_rescan ? -EAGAIN : -ENXIO;
 

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 2da01b7..bdf1369 100644 (file)
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -296,7 +296,7 @@ static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow)
                /* Will be done on the slow path. */
                return -EAGAIN;
        }
-       if (stsch(schid, &schib) || !schib.pmcw.dnv) {
+       if (stsch_err(schid, &schib) || !schib.pmcw.dnv) {
                /* Unusable - ignore. */
                return 0;
        }