#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;	char *scratch;	int i = 0;	int length = 0; 	if (!dev)		return -ENODEV; 	pdev = to_pci_dev(dev);	if (!pdev)		return -ENODEV; 	scratch = buffer; 	/* stuff we want to pass to /sbin/hotplug */	envp[i++] = scratch;	length += scnprintf (scratch, buffer_size - length, "PCI_CLASS=%04X",			    pdev->class);	if ((buffer_size - length <= 0) || (i >= num_envp))		return -ENOMEM;	++length;	scratch += length; 	envp[i++] = scratch;	length += scnprintf (scratch, buffer_size - length, "PCI_ID=%04X:%04X",			    pdev->vendor, pdev->device);	if ((buffer_size - length <= 0) || (i >= num_envp))		return -ENOMEM;	++length;	scratch += length; 	envp[i++] = scratch;	length += scnprintf (scratch, buffer_size - length,			    "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,			    pdev->subsystem_device);	if ((buffer_size - length <= 0) || (i >= num_envp))		return -ENOMEM;	++length;	scratch += length; 	envp[i++] = scratch;	length += scnprintf (scratch, buffer_size - length, "PCI_SLOT_NAME=%s",			    pci_name(pdev));	if ((buffer_size - length <= 0) || (i >= num_envp))		return -ENOMEM; 	envp[i++] = scratch;	length += scnprintf (scratch, 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));	if ((buffer_size - length <= 0) || (i >= num_envp))		return -ENOMEM; 	envp[i] = NULL; 	return 0;}