#include "device.h"
#include "ioasm.h"
#include "io_sch.h"
+#include "blacklist.h"
static struct timer_list recovery_timer;
static DEFINE_SPINLOCK(recovery_lock);
device_del(&cdev->dev);
}
-static void ccw_device_remove_orphan_cb(struct device *dev)
+static void ccw_device_remove_orphan_cb(struct work_struct *work)
{
- struct ccw_device *cdev = to_ccwdev(dev);
+ struct ccw_device_private *priv;
+ struct ccw_device *cdev;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
ccw_device_unregister(cdev);
put_device(&cdev->dev);
+ /* Release cdev reference for workqueue processing. */
+ put_device(&cdev->dev);
}
-static void ccw_device_remove_sch_cb(struct device *dev)
-{
- struct subchannel *sch;
-
- sch = to_subchannel(dev);
- css_sch_device_unregister(sch);
- /* Reset intparm to zeroes. */
- sch->schib.pmcw.intparm = 0;
- cio_modify(sch);
- put_device(&sch->dev);
-}
+static void ccw_device_call_sch_unregister(struct work_struct *work);
static void
ccw_device_remove_disconnected(struct ccw_device *cdev)
{
unsigned long flags;
- int rc;
/*
* Forced offline in disconnected state means
* 'throw away device'.
*/
+ /* Get cdev reference for workqueue processing. */
+ if (!get_device(&cdev->dev))
+ return;
if (ccw_device_is_orphan(cdev)) {
/*
* Deregister ccw device.
spin_lock_irqsave(cdev->ccwlock, flags);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
- rc = device_schedule_callback(&cdev->dev,
- ccw_device_remove_orphan_cb);
- if (rc)
- CIO_MSG_EVENT(0, "Couldn't unregister orphan "
- "0.%x.%04x\n",
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno);
- return;
- }
- /* Deregister subchannel, which will kill the ccw device. */
- rc = device_schedule_callback(cdev->dev.parent,
- ccw_device_remove_sch_cb);
- if (rc)
- CIO_MSG_EVENT(0, "Couldn't unregister disconnected device "
- "0.%x.%04x\n",
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno);
+ PREPARE_WORK(&cdev->private->kick_work,
+ ccw_device_remove_orphan_cb);
+ } else
+ /* Deregister subchannel, which will kill the ccw device. */
+ PREPARE_WORK(&cdev->private->kick_work,
+ ccw_device_call_sch_unregister);
+ queue_work(slow_path_wq, &cdev->private->kick_work);
}
/**
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
+ /* Get subchannel reference for local processing. */
+ if (!get_device(cdev->dev.parent))
+ return;
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
+ /* Release cdev reference for workqueue processing.*/
put_device(&cdev->dev);
+ /* Release subchannel reference for local processing. */
put_device(&sch->dev);
}
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister);
queue_work(slow_path_wq, &cdev->private->kick_work);
+ /* Release subchannel reference for asynchronous recognition. */
+ put_device(&sch->dev);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
break;
cdev = sch_get_cdev(sch);
CIO_TRACE_EVENT(3, "IRQ");
- CIO_TRACE_EVENT(3, sch->dev.bus_id);
+ CIO_TRACE_EVENT(3, dev_name(&sch->dev));
if (cdev)
dev_fsm_event(cdev, DEV_EVENT_INTERRUPT);
}
spin_unlock_irqrestore(&recovery_lock, flags);
}
+static int purge_fn(struct device *dev, void *data)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct ccw_device_private *priv = cdev->private;
+ int unreg;
+
+ spin_lock_irq(cdev->ccwlock);
+ unreg = is_blacklisted(priv->dev_id.ssid, priv->dev_id.devno) &&
+ (priv->state == DEV_STATE_OFFLINE);
+ spin_unlock_irq(cdev->ccwlock);
+ if (!unreg)
+ goto out;
+ if (!get_device(&cdev->dev))
+ goto out;
+ CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x\n", priv->dev_id.ssid,
+ priv->dev_id.devno);
+ PREPARE_WORK(&cdev->private->kick_work, ccw_device_call_sch_unregister);
+ queue_work(slow_path_wq, &cdev->private->kick_work);
+
+out:
+ /* Abort loop in case of pending signal. */
+ if (signal_pending(current))
+ return -EINTR;
+
+ return 0;
+}
+
+/**
+ * ccw_purge_blacklisted - purge unused, blacklisted devices
+ *
+ * Unregister all ccw devices that are offline and on the blacklist.
+ */
+int ccw_purge_blacklisted(void)
+{
+ CIO_MSG_EVENT(2, "ccw: purging blacklisted devices\n");
+ bus_for_each_dev(&ccw_bus_type, NULL, NULL, purge_fn);
+ return 0;
+}
+
static void device_set_disconnected(struct ccw_device *cdev)
{
if (!cdev)
bus_id = id;
- return (strncmp(bus_id, dev->bus_id, BUS_ID_SIZE) == 0);
+ return (strncmp(bus_id, dev_name(dev), BUS_ID_SIZE) == 0);
}