[S390] pm: vmlogrdr power management callbacks (9f62fa16) · Commits · e / devices / android_kernel_teracube_emerald

drivers/s390/char/vmlogrdr.c

+26 −1

Original line number	Diff line number	Diff line
		@@ -3,7 +3,7 @@
		* character device driver for reading z/VM system service records
		*
		*
		* Copyright 2004 IBM Corporation
		* Copyright IBM Corp. 2004, 2009
		* character device driver for reading z/VM system service records,
		* Version 1.0
		* Author(s): Xenia Tkatschow <xenia@us.ibm.com>
		@@ -660,6 +660,29 @@ static struct attribute *vmlogrdr_attrs[] = {
		NULL,
		};

		static int vmlogrdr_pm_prepare(struct device *dev)
		{
		int rc;
		struct vmlogrdr_priv_t *priv = dev->driver_data;

		rc = 0;
		if (priv) {
		spin_lock_bh(&priv->priv_lock);
		if (priv->dev_in_use)
		rc = -EBUSY;
		spin_unlock_bh(&priv->priv_lock);
		}
		if (rc)
		pr_err("vmlogrdr: device %s is busy. Refuse to suspend.\n",
		dev_name(dev));
		return rc;
		}


		static struct dev_pm_ops vmlogrdr_pm_ops = {
		.prepare = vmlogrdr_pm_prepare,
		};

		static struct attribute_group vmlogrdr_attr_group = {
		.attrs = vmlogrdr_attrs,
		};
		@@ -668,6 +691,7 @@ static struct class *vmlogrdr_class;
		static struct device_driver vmlogrdr_driver = {
		.name = "vmlogrdr",
		.bus = &iucv_bus,
		.pm = &vmlogrdr_pm_ops,
		};


		@@ -729,6 +753,7 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv)
		dev->bus = &iucv_bus;
		dev->parent = iucv_root;
		dev->driver = &vmlogrdr_driver;
		dev->driver_data = priv;
		/*
		* The release function could be called after the
		* module has been unloaded. It's _only_ task is to