drivers/pci/hotplug.c

   1 #include <linux/kernel.h>
   2 #include <linux/pci.h>
   3 #include <linux/module.h>
   4 #include "pci.h"
   5
   6 int pci_hotplug (struct device *dev, char **envp, int num_envp,
   7                  char *buffer, int buffer_size)
   8 {
   9         struct pci_dev *pdev;
  10         char *scratch;
  11         int i = 0;
  12         int length = 0;
  13
  14         if (!dev)
  15                 return -ENODEV;
  16
  17         pdev = to_pci_dev(dev);
  18         if (!pdev)
  19                 return -ENODEV;
  20
  21         scratch = buffer;
  22
  23         /* stuff we want to pass to /sbin/hotplug */
  24         envp[i++] = scratch;
  25         length += scnprintf (scratch, buffer_size - length, "PCI_CLASS=%04X",
  26                             pdev->class);
  27         if ((buffer_size - length <= 0) || (i >= num_envp))
  28                 return -ENOMEM;
  29         ++length;
  30         scratch += length;
  31
  32         envp[i++] = scratch;
  33         length += scnprintf (scratch, buffer_size - length, "PCI_ID=%04X:%04X",
  34                             pdev->vendor, pdev->device);
  35         if ((buffer_size - length <= 0) || (i >= num_envp))
  36                 return -ENOMEM;
  37         ++length;
  38         scratch += length;
  39
  40         envp[i++] = scratch;
  41         length += scnprintf (scratch, buffer_size - length,
  42                             "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
  43                             pdev->subsystem_device);
  44         if ((buffer_size - length <= 0) || (i >= num_envp))
  45                 return -ENOMEM;
  46         ++length;
  47         scratch += length;
  48
  49         envp[i++] = scratch;
  50         length += scnprintf (scratch, buffer_size - length, "PCI_SLOT_NAME=%s",
  51                             pci_name(pdev));
  52         if ((buffer_size - length <= 0) || (i >= num_envp))
  53                 return -ENOMEM;
  54
  55         envp[i++] = scratch;
  56         length += scnprintf (scratch, buffer_size - length,
  57                             "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
  58                             pdev->vendor, pdev->device,
  59                             pdev->subsystem_vendor, pdev->subsystem_device,
  60                             (u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
  61                             (u8)(pdev->class));
  62         if ((buffer_size - length <= 0) || (i >= num_envp))
  63                 return -ENOMEM;
  64
  65         envp[i] = NULL;
  66
  67         return 0;
  68 }