update-pciids: Re-compress pci.ids if needed

[pciutils.git] / lib / sysfs.c

diff --git a/lib/sysfs.c b/lib/sysfs.c
index db54110547edfe47e3f09ccea60014789bc49a7e..8cab869306894822344597ea7875c1e2416e8de3 100644 (file)
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -4,7 +4,9 @@
  *     Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
  *     Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
  *
- *     Can be freely distributed and used under the terms of the GNU GPL.
+ *     Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ *     SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #define _GNU_SOURCE
@@ -381,6 +383,39 @@ sysfs_fill_info(struct pci_dev *d, unsigned int flags)
          d->irq = sysfs_get_value(d, "irq", 1);
       if (want_fill(d, flags, PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES | PCI_FILL_IO_FLAGS | PCI_FILL_BRIDGE_BASES))
          sysfs_get_resources(d);
+      if (want_fill(d, flags, PCI_FILL_PARENT))
+       {
+         unsigned int domain, bus, dev, func;
+         char *path_abs, *path_canon, *name;
+         char path_rel[OBJNAMELEN];
+         struct pci_dev *parent;
+
+         /* Construct sysfs path for parent device */
+         sysfs_obj_name(d, "..", path_rel);
+         path_abs = realpath(path_rel, NULL);
+         name = path_abs ? strrchr(path_abs, '/') : NULL;
+         name = name ? name+1 : name;
+         parent = NULL;
+
+         if (name && sscanf(name, "%x:%x:%x.%d", &domain, &bus, &dev, &func) == 4 && domain <= 0x7fffffff)
+           for (parent = d->access->devices; parent; parent = parent->next)
+             if (parent->domain == (int)domain && parent->bus == bus && parent->dev == dev && parent->func == func)
+               break;
+
+         if (parent)
+           {
+             /* Check if parsed BDF address from parent sysfs device is really expected PCI device */
+             sysfs_obj_name(parent, ".", path_rel);
+             path_canon = realpath(path_rel, NULL);
+             if (!path_canon || strcmp(path_canon, path_abs) != 0)
+               parent = NULL;
+           }
+
+         if (parent)
+           d->parent = parent;
+         else
+           clear_fill(d, PCI_FILL_PARENT);
+       }
     }
 
   if (want_fill(d, flags, PCI_FILL_PHYS_SLOT))
@@ -428,6 +463,20 @@ sysfs_fill_info(struct pci_dev *d, unsigned int flags)
        }
     }
 
+  if (want_fill(d, flags, PCI_FILL_DRIVER))
+    {
+      char *driver_path = sysfs_deref_link(d, "driver");
+      if (driver_path)
+        {
+          char *driver = strrchr(driver_path, '/');
+          driver = driver ? driver+1 : driver_path;
+          pci_set_property(d, PCI_FILL_DRIVER, driver);
+          free(driver_path);
+        }
+      else
+        clear_fill(d, PCI_FILL_DRIVER);
+    }
+
   pci_generic_fill_info(d, flags);
 }