diff options
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r-- | drivers/s390/cio/device.c | 24 | ||||
-rw-r--r-- | drivers/s390/cio/qdio_main.c | 16 |
2 files changed, 26 insertions, 14 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index df14c51..8e04c00 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -541,15 +541,24 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr, int force, ret; unsigned long i; - if (!dev_fsm_final_state(cdev) && - cdev->private->state != DEV_STATE_DISCONNECTED) - return -EAGAIN; + /* Prevent conflict between multiple on-/offline processing requests. */ if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0) return -EAGAIN; + /* Prevent conflict between internal I/Os and on-/offline processing. */ + if (!dev_fsm_final_state(cdev) && + cdev->private->state != DEV_STATE_DISCONNECTED) { + ret = -EAGAIN; + goto out_onoff; + } + /* Prevent conflict between pending work and on-/offline processing.*/ + if (work_pending(&cdev->private->todo_work)) { + ret = -EAGAIN; + goto out_onoff; + } if (cdev->drv && !try_module_get(cdev->drv->driver.owner)) { - atomic_set(&cdev->private->onoff, 0); - return -EINVAL; + ret = -EINVAL; + goto out_onoff; } if (!strncmp(buf, "force\n", count)) { force = 1; @@ -574,6 +583,7 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr, out: if (cdev->drv) module_put(cdev->drv->driver.owner); +out_onoff: atomic_set(&cdev->private->onoff, 0); return (ret < 0) ? ret : count; } @@ -1311,10 +1321,12 @@ static int purge_fn(struct device *dev, void *data) spin_lock_irq(cdev->ccwlock); if (is_blacklisted(id->ssid, id->devno) && - (cdev->private->state == DEV_STATE_OFFLINE)) { + (cdev->private->state == DEV_STATE_OFFLINE) && + (atomic_cmpxchg(&cdev->private->onoff, 0, 1) == 0)) { CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x\n", id->ssid, id->devno); ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); + atomic_set(&cdev->private->onoff, 0); } spin_unlock_irq(cdev->ccwlock); /* Abort loop in case of pending signal. */ diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 479c665..c532ba9 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -1649,26 +1649,26 @@ static int __init init_QDIO(void) { int rc; - rc = qdio_setup_init(); + rc = qdio_debug_init(); if (rc) return rc; + rc = qdio_setup_init(); + if (rc) + goto out_debug; rc = tiqdio_allocate_memory(); if (rc) goto out_cache; - rc = qdio_debug_init(); - if (rc) - goto out_ti; rc = tiqdio_register_thinints(); if (rc) - goto out_debug; + goto out_ti; return 0; -out_debug: - qdio_debug_exit(); out_ti: tiqdio_free_memory(); out_cache: qdio_setup_exit(); +out_debug: + qdio_debug_exit(); return rc; } @@ -1676,8 +1676,8 @@ static void __exit exit_QDIO(void) { tiqdio_unregister_thinints(); tiqdio_free_memory(); - qdio_debug_exit(); qdio_setup_exit(); + qdio_debug_exit(); } module_init(init_QDIO); |