WSL2-Linux-Kernel/drivers/pci/hotplug.c

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/module.h>
#include "pci.h"

int pci_hotplug (struct device *dev, char **envp, int num_envp,
		 char *buffer, int buffer_size)
{
	struct pci_dev *pdev;
	int i = 0;
	int length = 0;

	if (!dev)
		return -ENODEV;

	pdev = to_pci_dev(dev);
	if (!pdev)
		return -ENODEV;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"PCI_CLASS=%04X", pdev->class))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
				pdev->subsystem_device))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"PCI_SLOT_NAME=%s", pci_name(pdev)))
		return -ENOMEM;

	if (add_hotplug_env_var(envp, num_envp, &i,
				buffer, buffer_size, &length,
				"MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x",
				pdev->vendor, pdev->device,
				pdev->subsystem_vendor, pdev->subsystem_device,
				(u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
				(u8)(pdev->class)))
		return -ENOMEM;

	envp[i] = NULL;

	return 0;
}