Driver core: add uevent vars for devices of a class

Devices converted from class_device to device should have
the same uevent keys as the original class_device had. We
search up the parents until we find the first bus device and
add the (already deprecated) PHYDEV* values.

Signed-off-by: Kay Sievers <kay.sievers@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 34 insertions, 12 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 6fee3e6b1ac2..7a5336f7df89 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -154,25 +154,47 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                                "MINOR=%u", MINOR(dev->devt));
         }
 
-#ifdef CONFIG_SYSFS_DEPRECATED
-        /* add bus name (same as SUBSYSTEM, deprecated) */
-        if (dev->bus)
-                add_uevent_var(envp, num_envp, &i,
-                               buffer, buffer_size, &length,
-                               "PHYSDEVBUS=%s", dev->bus->name);
-#endif
-
-        /* add driver name (PHYSDEV* values are deprecated)*/
-        if (dev->driver) {
+        if (dev->driver)
                 add_uevent_var(envp, num_envp, &i,
                                buffer, buffer_size, &length,
                                "DRIVER=%s", dev->driver->name);
+
 #ifdef CONFIG_SYSFS_DEPRECATED
+        if (dev->class) {
+                struct device *parent = dev->parent;
+
+                /* find first bus device in parent chain */
+                while (parent && !parent->bus)
+                        parent = parent->parent;
+                if (parent && parent->bus) {
+                        const char *path;
+
+                        path = kobject_get_path(&parent->kobj, GFP_KERNEL);
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVPATH=%s", path);
+                        kfree(path);
+
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVBUS=%s", parent->bus->name);
+
+                        if (parent->driver)
+                                add_uevent_var(envp, num_envp, &i,
+                                               buffer, buffer_size, &length,
+                                               "PHYSDEVDRIVER=%s", parent->driver->name);
+                }
+        } else if (dev->bus) {
                 add_uevent_var(envp, num_envp, &i,
                                buffer, buffer_size, &length,
-                               "PHYSDEVDRIVER=%s", dev->driver->name);
-#endif
+                               "PHYSDEVBUS=%s", dev->bus->name);
+
+                if (dev->driver)
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVDRIVER=%s", dev->driver->name);
         }
+#endif
 
         /* terminate, set to next free slot, shrink available space */
         envp[i] = NULL;