[S390] pm: vmlogrdr power management callbacks
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -3,7 +3,7 @@
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* character device driver for reading z/VM system service records
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*
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*
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* Copyright 2004 IBM Corporation
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* Copyright IBM Corp. 2004, 2009
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* character device driver for reading z/VM system service records,
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* Version 1.0
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* Author(s): Xenia Tkatschow <xenia@us.ibm.com>
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@ -660,6 +660,29 @@ static struct attribute *vmlogrdr_attrs[] = {
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NULL,
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};
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static int vmlogrdr_pm_prepare(struct device *dev)
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{
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int rc;
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struct vmlogrdr_priv_t *priv = dev->driver_data;
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rc = 0;
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if (priv) {
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spin_lock_bh(&priv->priv_lock);
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if (priv->dev_in_use)
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rc = -EBUSY;
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spin_unlock_bh(&priv->priv_lock);
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}
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if (rc)
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pr_err("vmlogrdr: device %s is busy. Refuse to suspend.\n",
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dev_name(dev));
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return rc;
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}
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static struct dev_pm_ops vmlogrdr_pm_ops = {
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.prepare = vmlogrdr_pm_prepare,
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};
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static struct attribute_group vmlogrdr_attr_group = {
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.attrs = vmlogrdr_attrs,
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};
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@ -668,6 +691,7 @@ static struct class *vmlogrdr_class;
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static struct device_driver vmlogrdr_driver = {
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.name = "vmlogrdr",
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.bus = &iucv_bus,
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.pm = &vmlogrdr_pm_ops,
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};
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@ -729,6 +753,7 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv)
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dev->bus = &iucv_bus;
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dev->parent = iucv_root;
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dev->driver = &vmlogrdr_driver;
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dev->driver_data = priv;
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/*
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* The release function could be called after the
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* module has been unloaded. It's _only_ task is to
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