[PATCH] s390: fix locking in __chp_add() and s390_subchannel_remove_chpid()
Fix locking in __chp_add() and s390_subchannel_remove_chpid(): Need to
disable/enable because they are always called from a thread (and not
directly from a machine check...)
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 92be75d..8cf9905 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -232,7 +232,7 @@
return 0;
mask = 0x80 >> j;
- spin_lock(&sch->lock);
+ spin_lock_irq(&sch->lock);
stsch(sch->schid, &schib);
if (!schib.pmcw.dnv)
@@ -281,10 +281,10 @@
if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
out_unlock:
- spin_unlock(&sch->lock);
+ spin_unlock_irq(&sch->lock);
return 0;
out_unreg:
- spin_unlock(&sch->lock);
+ spin_unlock_irq(&sch->lock);
sch->lpm = 0;
if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
@@ -652,7 +652,7 @@
if (!sch)
/* Check if the subchannel is now available. */
return __chp_add_new_sch(schid);
- spin_lock(&sch->lock);
+ spin_lock_irq(&sch->lock);
for (i=0; i<8; i++)
if (sch->schib.pmcw.chpid[i] == chp->id) {
if (stsch(sch->schid, &sch->schib) != 0) {
@@ -674,7 +674,7 @@
if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- spin_unlock(&sch->lock);
+ spin_unlock_irq(&sch->lock);
put_device(&sch->dev);
return 0;
}