summaryrefslogtreecommitdiff
path: root/drivers/s390/cio/cio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/cio/cio.c')
-rw-r--r--drivers/s390/cio/cio.c29
1 files changed, 4 insertions, 25 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 3ab99d883888..af5fd716449f 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -471,15 +471,6 @@ int cio_disable_subchannel(struct subchannel *sch)
}
EXPORT_SYMBOL_GPL(cio_disable_subchannel);
-int cio_create_sch_lock(struct subchannel *sch)
-{
- sch->lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL);
- if (!sch->lock)
- return -ENOMEM;
- spin_lock_init(sch->lock);
- return 0;
-}
-
static int cio_check_devno_blacklisted(struct subchannel *sch)
{
if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
@@ -536,28 +527,19 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
sprintf(dbf_txt, "valsch%x", schid.sch_no);
CIO_TRACE_EVENT(4, dbf_txt);
- /* Nuke all fields. */
- memset(sch, 0, sizeof(struct subchannel));
-
- sch->schid = schid;
- err = cio_create_sch_lock(sch);
- if (err)
- goto out;
- mutex_init(&sch->reg_mutex);
-
/*
* The first subchannel that is not-operational (ccode==3)
- * indicates that there aren't any more devices available.
+ * indicates that there aren't any more devices available.
* If stsch gets an exception, it means the current subchannel set
- * is not valid.
+ * is not valid.
*/
- ccode = stsch_err (schid, &sch->schib);
+ ccode = stsch_err(schid, &sch->schib);
if (ccode) {
err = (ccode == 3) ? -ENXIO : ccode;
goto out;
}
- /* Copy subchannel type from path management control word. */
sch->st = sch->schib.pmcw.st;
+ sch->schid = schid;
switch (sch->st) {
case SUBCHANNEL_TYPE_IO:
@@ -574,10 +556,7 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
sch->schid.ssid, sch->schid.sch_no, sch->st);
- return 0;
out:
- kfree(sch->lock);
- sch->lock = NULL;
return err;
}