C++ pm_runtime_forbid函数代码示例

static ssize_t store_ehci_power(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd);
	int power_on;
	int irq;
	int retval;

	if (sscanf(buf, "%d", &power_on) != 1)
		return -EINVAL;

	device_lock(dev);

	if (!power_on && s5p_ehci->power_on) {
		dev_info(dev, "EHCI turn off\n");
		pm_runtime_forbid(dev);
		s5p_ehci->power_on = 0;
		usb_remove_hcd(hcd);

		if (s5p_ehci->phy) {
			/* Shutdown PHY only if it wasn't shutdown before */
			if (!s5p_ehci->post_lpa_resume)
				usb_phy_shutdown(s5p_ehci->phy);
		} else if (s5p_ehci->pdata->phy_exit) {
			s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
		}
	} else if (power_on) {
		dev_info(dev, "EHCI turn on\n");
		if (s5p_ehci->power_on) {
			pm_runtime_forbid(dev);
			usb_remove_hcd(hcd);
		} else {
			s5p_ehci_phy_init(pdev);
		}

		irq = platform_get_irq(pdev, 0);
		retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
		if (retval < 0) {
			dev_err(dev, "Power On Fail\n");
			goto exit;
		}

		/*
		 * EHCI root hubs are expected to handle remote wakeup.
		 * So, wakeup flag init defaults for root hubs.
		 */
		device_wakeup_enable(&hcd->self.root_hub->dev);

		s5p_ehci->power_on = 1;
		pm_runtime_allow(dev);
	}
exit:
	device_unlock(dev);
	return count;
}

static ssize_t store_ohci_power(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
	struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = exynos_ohci->hcd;
	int power_on;
	int irq;
	int retval;

	if (sscanf(buf, "%d", &power_on) != 1)
		return -EINVAL;

	device_lock(dev);
	if (!power_on && exynos_ohci->power_on) {
		printk(KERN_DEBUG "%s: EHCI turns off\n", __func__);
		pm_runtime_forbid(dev);
		exynos_ohci->power_on = 0;
		usb_remove_hcd(hcd);

		if (pdata && pdata->phy_exit)
			pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
	} else if (power_on) {
		printk(KERN_DEBUG "%s: EHCI turns on\n", __func__);
		if (exynos_ohci->power_on) {
			pm_runtime_forbid(dev);
			usb_remove_hcd(hcd);
		} else {
			if (pdata && pdata->phy_init)
				pdata->phy_init(pdev, S5P_USB_PHY_HOST);
		}

		irq = platform_get_irq(pdev, 0);
		retval = usb_add_hcd(hcd, irq,
				IRQF_DISABLED | IRQF_SHARED);
		if (retval < 0) {
			dev_err(dev, "Power On Fail\n");
			goto exit;
		}

		/*
		 * OHCI root hubs are expected to handle remote wakeup.
		 * So, wakeup flag init defaults for root hubs.
		 */
		device_wakeup_enable(&hcd->self.root_hub->dev);

		exynos_ohci->power_on = 1;
		pm_runtime_allow(dev);
	}

exit:
	device_unlock(dev);
	return count;
}

static void xhci_ush_pci_remove(struct pci_dev *dev)
{
	struct xhci_hcd *xhci;

	xhci = hcd_to_xhci(pci_get_drvdata(dev));
	if (xhci->shared_hcd) {
		usb_remove_hcd(xhci->shared_hcd);
		usb_put_hcd(xhci->shared_hcd);
	}

	if (!pci_dev_run_wake(dev))
		pm_runtime_get_noresume(&dev->dev);

	pm_runtime_forbid(&dev->dev);

	usb_hcd_pci_remove(dev);

	/* Free the aux irq */
	hsic_aux_irq_free();
	hsic_wakeup_irq_free();
	gpio_free(hsic.aux_gpio);
	gpio_free(hsic.wakeup_gpio);

	hsic.hsic_stopped = 1;
	hsic_enable = 0;

	kfree(xhci);
}

static int __devexit s5p_ehci_remove(struct platform_device *pdev)
{
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

#ifdef CONFIG_USB_SUSPEND
#ifdef CONFIG_MDM_HSIC_PM
	pm_runtime_forbid(&pdev->dev);
#else
	pm_runtime_put(hcd->self.controller);
	pm_runtime_disable(&pdev->dev);
#endif
#endif
	s5p_ehci->power_on = 0;
	remove_ehci_sys_file(hcd_to_ehci(hcd));
	usb_remove_hcd(hcd);

	if (pdata && pdata->phy_exit)
		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

	iounmap(hcd->regs);

	clk_disable(s5p_ehci->clk);
	clk_put(s5p_ehci->clk);

	usb_put_hcd(hcd);
	kfree(s5p_ehci);

	return 0;
}

/**
 * amdgpu_driver_unload_kms - Main unload function for KMS.
 *
 * @dev: drm dev pointer
 *
 * This is the main unload function for KMS (all asics).
 * Returns 0 on success.
 */
void amdgpu_driver_unload_kms(struct drm_device *dev)
{
	struct amdgpu_device *adev = dev->dev_private;

	if (adev == NULL)
		return;

	if (adev->rmmio == NULL)
		goto done_free;

	if (amdgpu_sriov_vf(adev))
		amdgpu_virt_request_full_gpu(adev, false);

	if (amdgpu_device_is_px(dev)) {
		pm_runtime_get_sync(dev->dev);
		pm_runtime_forbid(dev->dev);
	}

	amdgpu_amdkfd_device_fini(adev);

	amdgpu_acpi_fini(adev);

	amdgpu_device_fini(adev);

done_free:
	kfree(adev);
	dev->dev_private = NULL;
}

/**
* intel_sst_remove - PCI remove function
*
* @pci:	PCI device structure
*
* This function is called by OS when a device is unloaded
* This frees the interrupt etc
*/
static void __devexit intel_sst_remove(struct pci_dev *pci)
{
	pm_runtime_get_noresume(&pci->dev);
	pm_runtime_forbid(&pci->dev);
	pci_dev_put(sst_drv_ctx->pci);
	mutex_lock(&sst_drv_ctx->sst_lock);
	sst_drv_ctx->sst_state = SST_UN_INIT;
	mutex_unlock(&sst_drv_ctx->sst_lock);
	misc_deregister(&lpe_ctrl);
	free_irq(pci->irq, sst_drv_ctx);
	iounmap(sst_drv_ctx->dram);
	iounmap(sst_drv_ctx->iram);
	iounmap(sst_drv_ctx->mailbox);
	iounmap(sst_drv_ctx->shim);
	sst_drv_ctx->pmic_state = SND_MAD_UN_INIT;
	if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) {
		misc_deregister(&lpe_dev);
		kfree(sst_drv_ctx->mmap_mem);
	} else
		kfree(sst_drv_ctx->fw_cntx);
	flush_scheduled_work();
	destroy_workqueue(sst_drv_ctx->process_reply_wq);
	destroy_workqueue(sst_drv_ctx->process_msg_wq);
	destroy_workqueue(sst_drv_ctx->post_msg_wq);
	destroy_workqueue(sst_drv_ctx->mad_wq);
	kfree(pci_get_drvdata(pci));
	sst_drv_ctx = NULL;
	pci_release_regions(pci);
	pci_disable_device(pci);
	pci_set_drvdata(pci, NULL);
}

/* Create a DIMM object under specifed memory controller device */
static int edac_create_dimm_object(struct mem_ctl_info *mci,
				   struct dimm_info *dimm,
				   int index)
{
	int err;
	dimm->mci = mci;

	dimm->dev.type = &dimm_attr_type;
	dimm->dev.bus = mci->bus;
	device_initialize(&dimm->dev);

	dimm->dev.parent = &mci->dev;
	if (mci->csbased)
		dev_set_name(&dimm->dev, "rank%d", index);
	else
		dev_set_name(&dimm->dev, "dimm%d", index);
	dev_set_drvdata(&dimm->dev, dimm);
	pm_runtime_forbid(&mci->dev);

	err =  device_add(&dimm->dev);

	edac_dbg(0, "creating rank/dimm device %s\n", dev_name(&dimm->dev));

	return err;
}

static void dwc_otg_remove(struct pci_dev *pdev)
{
	struct dwc_otg2 *otg = the_transceiver;
	int resource, len;

	if (otg->gadget)
		platform_device_unregister(otg->gadget);
	if (otg->host)
		platform_device_unregister(otg->host);

	wake_lock_destroy(&wakelock);

	pm_runtime_forbid(&pdev->dev);
	pm_runtime_set_suspended(&pdev->dev);

	kfree(platform_par);
	iounmap(otg->usb2_phy.io_priv);

	usb_remove_phy(&otg->usb2_phy);
	usb_remove_phy(&otg->usb3_phy);
	kfree(otg);
	otg = NULL;

	resource = pci_resource_start(pdev, 0);
	len = pci_resource_len(pdev, 0);
	release_mem_region(resource, len);

	pci_disable_device(pdev);

	the_transceiver = NULL;
}

static void
serial_omap_pm(struct uart_port *port, unsigned int state,
	       unsigned int oldstate)
{
	struct uart_omap_port *up = (struct uart_omap_port *)port;
	unsigned char efr;

	dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->port.line);

	pm_runtime_get_sync(&up->pdev->dev);
	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
	efr = serial_in(up, UART_EFR);
	serial_out(up, UART_EFR, efr | UART_EFR_ECB);
	serial_out(up, UART_LCR, 0);

	serial_out(up, UART_IER, (state != 0) ? UART_IERX_SLEEP : 0);
	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
	serial_out(up, UART_EFR, efr);
	serial_out(up, UART_LCR, 0);

	if (!device_may_wakeup(&up->pdev->dev)) {
		if (!state)
			pm_runtime_forbid(&up->pdev->dev);
		else
			pm_runtime_allow(&up->pdev->dev);
	}

	pm_runtime_put(&up->pdev->dev);
}

static void intel_lpss_pci_remove(struct pci_dev *pdev)
{
	pm_runtime_forbid(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	intel_lpss_remove(&pdev->dev);
}

static ssize_t store_autosuspend(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct miscdevice *miscdev = dev_get_drvdata(dev);
	struct link_pm_data *pm_data = container_of(miscdev,
			struct link_pm_data, miscdev);
	struct usb_link_device *usb_ld = pm_data->usb_ld;
	struct task_struct *task = get_current();
	char taskname[TASK_COMM_LEN];

	mif_info("autosuspend: %s: %s(%d)'\n",
			buf, get_task_comm(taskname, task), task->pid);

	if (!strncmp(buf, "on", 2)) {
		pm_data->autosuspend = true;
		if (usb_ld->usbdev)
			pm_runtime_allow(&usb_ld->usbdev->dev);
	} else if (!strncmp(buf, "off", 3)) {
		pm_data->autosuspend = false;
		if (usb_ld->usbdev)
			pm_runtime_forbid(&usb_ld->usbdev->dev);
	}

	return count;
}

void wil_pm_runtime_forbid(struct wil6210_priv *wil)
{
	struct device *dev = wil_to_dev(wil);

	pm_runtime_forbid(dev);
	pm_runtime_get_noresume(dev);
}

/**
 * amdgpu_driver_unload_kms - Main unload function for KMS.
 *
 * @dev: drm dev pointer
 *
 * This is the main unload function for KMS (all asics).
 * Returns 0 on success.
 */
int amdgpu_driver_unload_kms(struct drm_device *dev)
{
	struct amdgpu_device *adev = dev->dev_private;

	if (adev == NULL)
		return 0;

	if (adev->rmmio == NULL)
		goto done_free;

	if (amdgpu_device_is_px(dev)) {
		pm_runtime_get_sync(dev->dev);
		pm_runtime_forbid(dev->dev);
	}

	amdgpu_amdkfd_device_fini(adev);

	amdgpu_acpi_fini(adev);

	amdgpu_device_fini(adev);

done_free:
	kfree(adev);
	dev->dev_private = NULL;
	return 0;
}

static void xhci_ush_pci_remove(struct pci_dev *dev)
{
	struct xhci_hcd *xhci;

	xhci = hcd_to_xhci(pci_get_drvdata(dev));
	if (xhci->shared_hcd) {
		usb_remove_hcd(xhci->shared_hcd);
		usb_put_hcd(xhci->shared_hcd);
	}

	if (!pci_dev_run_wake(dev))
		pm_runtime_get_noresume(&dev->dev);

	pm_runtime_forbid(&dev->dev);

	usb_hcd_pci_remove(dev);

	/* Free the aux irq */
	hsic_aux_irq_free();
	hsic_wakeup_irq_free();
	gpio_free(hsic.aux_gpio);
	gpio_free(hsic.wakeup_gpio);

	hsic.port_disconnect = 1;
	hsic_enable = 0;
	wake_lock_destroy(&(hsic.resume_wake_lock));
	wake_lock_destroy(&hsic.s3_wake_lock);
	usb_unregister_notify(&hsic.hsic_pm_nb);
	unregister_pm_notifier(&hsic.hsic_s3_entry_nb);

	kfree(xhci);
}

static void if_usb_disconnect(struct usb_interface *intf)
{
	struct usb_link_device *usb_ld  = usb_get_intfdata(intf);
	struct usb_device *usbdev = usb_ld->usbdev;
	struct link_pm_data *pm_data = usb_ld->link_pm_data;
	int dev_id = intf->altsetting->desc.bInterfaceNumber;
	struct if_usb_devdata *pipe_data = &usb_ld->devdata[dev_id];


	usb_set_intfdata(intf, NULL);

	pipe_data->disconnected = 1;
	smp_wmb();

	wake_up(&usb_ld->l2_wait);

	usb_ld->if_usb_connected = 0;
	usb_ld->flow_suspend = 1;

	dev_dbg(&usbdev->dev, "%s\n", __func__);
	usb_ld->dev_count--;
	usb_driver_release_interface(&if_usb_driver, pipe_data->data_intf);

	usb_kill_anchored_urbs(&pipe_data->reading);
	usb_free_urbs(usb_ld, pipe_data);

	if (usb_ld->dev_count == 0) {
		cancel_delayed_work_sync(&usb_ld->runtime_pm_work);
		cancel_delayed_work_sync(&usb_ld->post_resume_work);
		cancel_delayed_work_sync(&usb_ld->ld.tx_delayed_work);
		usb_put_dev(usbdev);
		usb_ld->usbdev = NULL;
		pm_runtime_forbid(pm_data->root_hub);
	}
}