static void ne_pci_dev_disable()

in drivers/virt/nitro_enclaves/ne_pci_dev.c [428:454]

• 18 lines of code
• 4 McCabe index (conditional complexity)

static void ne_pci_dev_disable(struct pci_dev *pdev)
{
	u8 dev_disable_reply = 0;
	struct ne_pci_dev *ne_pci_dev = pci_get_drvdata(pdev);
	const unsigned int sleep_time = 10; /* 10 ms */
	unsigned int sleep_time_count = 0;

	iowrite8(NE_ENABLE_OFF, ne_pci_dev->iomem_base + NE_ENABLE);

	/*
	 * Check for NE_ENABLE_OFF in a loop, to handle cases when the device
	 * state is not immediately set to disabled and going through a
	 * transitory state of disabling.
	 */
	while (sleep_time_count < NE_DEFAULT_TIMEOUT_MSECS) {
		dev_disable_reply = ioread8(ne_pci_dev->iomem_base + NE_ENABLE);
		if (dev_disable_reply == NE_ENABLE_OFF)
			return;

		msleep_interruptible(sleep_time);
		sleep_time_count += sleep_time;
	}

	dev_disable_reply = ioread8(ne_pci_dev->iomem_base + NE_ENABLE);
	if (dev_disable_reply != NE_ENABLE_OFF)
		dev_err(&pdev->dev, "Error in pci dev disable cmd\n");
}