[S390] cio: fix repeat setting of cdev parent association
sch_create_and_recog_new_device() associates a parent subchannel
with its ccw device child even though this is already done by
the subsequently called io_subchannel_recog(). Also make sure
io_subchannel_recog() sets the association under lock.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 55f9973..0efecef 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -888,9 +888,6 @@
css_sch_device_unregister(sch);
return;
}
- spin_lock_irq(sch->lock);
- sch_set_cdev(sch, cdev);
- spin_unlock_irq(sch->lock);
/* Start recognition for the new ccw device. */
if (io_subchannel_recog(cdev, sch)) {
spin_lock_irq(sch->lock);
@@ -1107,7 +1104,6 @@
int rc;
struct ccw_device_private *priv;
- sch_set_cdev(sch, cdev);
cdev->ccwlock = sch->lock;
/* Init private data. */
@@ -1125,6 +1121,7 @@
/* Start async. device sensing. */
spin_lock_irq(sch->lock);
+ sch_set_cdev(sch, cdev);
rc = ccw_device_recognition(cdev);
spin_unlock_irq(sch->lock);
if (rc) {