diff options
| -rw-r--r-- | drivers/s390/cio/eadm_sch.c | 27 | ||||
| -rw-r--r-- | drivers/s390/cio/eadm_sch.h | 4 |
2 files changed, 28 insertions, 3 deletions
diff --git a/drivers/s390/cio/eadm_sch.c b/drivers/s390/cio/eadm_sch.c index 6b54d8a05cd4..aca7bfc113aa 100644 --- a/drivers/s390/cio/eadm_sch.c +++ b/drivers/s390/cio/eadm_sch.c @@ -6,6 +6,7 @@ */ #include <linux/kernel_stat.h> +#include <linux/completion.h> #include <linux/workqueue.h> #include <linux/spinlock.h> #include <linux/device.h> @@ -159,6 +160,9 @@ static void eadm_subchannel_irq(struct subchannel *sch) } scm_irq_handler((struct aob *)(unsigned long)scsw->aob, error); private->state = EADM_IDLE; + + if (private->completion) + complete(private->completion); } static struct subchannel *eadm_get_idle_sch(void) @@ -255,13 +259,32 @@ out: static void eadm_quiesce(struct subchannel *sch) { + struct eadm_private *private = get_eadm_private(sch); + DECLARE_COMPLETION_ONSTACK(completion); int ret; + spin_lock_irq(sch->lock); + if (private->state != EADM_BUSY) + goto disable; + + if (eadm_subchannel_clear(sch)) + goto disable; + + private->completion = &completion; + spin_unlock_irq(sch->lock); + + wait_for_completion_io(&completion); + + spin_lock_irq(sch->lock); + private->completion = NULL; + +disable: + eadm_subchannel_set_timeout(sch, 0); do { - spin_lock_irq(sch->lock); ret = cio_disable_subchannel(sch); - spin_unlock_irq(sch->lock); } while (ret == -EBUSY); + + spin_unlock_irq(sch->lock); } static int eadm_subchannel_remove(struct subchannel *sch) diff --git a/drivers/s390/cio/eadm_sch.h b/drivers/s390/cio/eadm_sch.h index 2779be093982..9664e4653f98 100644 --- a/drivers/s390/cio/eadm_sch.h +++ b/drivers/s390/cio/eadm_sch.h @@ -1,6 +1,7 @@ #ifndef EADM_SCH_H #define EADM_SCH_H +#include <linux/completion.h> #include <linux/device.h> #include <linux/timer.h> #include <linux/list.h> @@ -9,9 +10,10 @@ struct eadm_private { union orb orb; enum {EADM_IDLE, EADM_BUSY, EADM_NOT_OPER} state; + struct completion *completion; + struct subchannel *sch; struct timer_list timer; struct list_head head; - struct subchannel *sch; } __aligned(8); #define get_eadm_private(n) ((struct eadm_private *)dev_get_drvdata(&n->dev)) |