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s390/qdio: get rid of spin_lock_irqsave usage 

All qdio functions that use spin_lock_irqsave are never used
from irq context. Thus it is safe to convert all of them to
use spin_lock_irq.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2016-07-29 13:41:20 +02:00 коммит произвёл Martin Schwidefsky
Родитель 1ab50a99f8
Коммит a48ed86715
1 изменённых файлов: 8 добавлений и 11 удалений
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19
drivers/s390/cio/qdio_main.c
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@ -1160,7 +1160,6 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
struct subchannel_id schid;
int rc;
unsigned long flags;
if (!irq_ptr)
return -ENODEV;
@ -1190,7 +1189,7 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
qdio_shutdown_debug_entries(irq_ptr);
/* cleanup subchannel */
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
spin_lock_irq(get_ccwdev_lock(cdev));
if (how & QDIO_FLAG_CLEANUP_USING_CLEAR)
rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
@ -1204,12 +1203,12 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
}
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
spin_unlock_irq(get_ccwdev_lock(cdev));
wait_event_interruptible_timeout(cdev->private->wait_q,
irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
irq_ptr->state == QDIO_IRQ_STATE_ERR,
10 * HZ);
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
spin_lock_irq(get_ccwdev_lock(cdev));
no_cleanup:
qdio_shutdown_thinint(irq_ptr);
@ -1217,7 +1216,7 @@ no_cleanup:
/* restore interrupt handler */
if ((void *)cdev->handler == (void *)qdio_int_handler)
cdev->handler = irq_ptr->orig_handler;
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
spin_unlock_irq(get_ccwdev_lock(cdev));
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
mutex_unlock(&irq_ptr->setup_mutex);
@ -1344,7 +1343,6 @@ int qdio_establish(struct qdio_initialize *init_data)
struct ccw_device *cdev = init_data->cdev;
struct subchannel_id schid;
struct qdio_irq *irq_ptr;
unsigned long saveflags;
int rc;
ccw_device_get_schid(cdev, &schid);
@ -1373,7 +1371,7 @@ int qdio_establish(struct qdio_initialize *init_data)
irq_ptr->ccw.count = irq_ptr->equeue.count;
irq_ptr->ccw.cda = (u32)((addr_t)irq_ptr->qdr);
spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags);
spin_lock_irq(get_ccwdev_lock(cdev));
ccw_device_set_options_mask(cdev, 0);
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0);
@ -1381,7 +1379,7 @@ int qdio_establish(struct qdio_initialize *init_data)
DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc) {
mutex_unlock(&irq_ptr->setup_mutex);
@ -1422,7 +1420,6 @@ int qdio_activate(struct ccw_device *cdev)
struct subchannel_id schid;
struct qdio_irq *irq_ptr;
int rc;
unsigned long saveflags;
ccw_device_get_schid(cdev, &schid);
DBF_EVENT("qactivate:%4x", schid.sch_no);
@ -1445,7 +1442,7 @@ int qdio_activate(struct ccw_device *cdev)
irq_ptr->ccw.count = irq_ptr->aqueue.count;
irq_ptr->ccw.cda = 0;
spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags);
spin_lock_irq(get_ccwdev_lock(cdev));
ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE,
@ -1454,7 +1451,7 @@ int qdio_activate(struct ccw_device *cdev)
DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4x", rc);
}
spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc)
goto out;