Driver core: keep PHYSDEV for old struct class_device

Class-devices created by "struct class_device" are going to be replaced
by "struct device". Keep the deprecated PHYSDEV* variables for the already
"deprecated" struct class_device" devices.

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

2 files changed, 27 insertions, 42 deletions

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 20c4ea6eb50d..8c506dbe3913 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -369,36 +369,6 @@ char *make_class_name(const char *name, struct kobject *kobj)
         return class_name;
 }
 
-static int deprecated_class_uevent(char **envp, int num_envp, int *cur_index,
-                                   char *buffer, int buffer_size,
-                                   int *cur_len,
-                                   struct class_device *class_dev)
-{
-        struct device *dev = class_dev->dev;
-        char *path;
-
-        if (!dev)
-                return 0;
-
-        /* add device, backing this class device (deprecated) */
-        path = kobject_get_path(&dev->kobj, GFP_KERNEL);
-
-        add_uevent_var(envp, num_envp, cur_index, buffer, buffer_size,
-                       cur_len, "PHYSDEVPATH=%s", path);
-        kfree(path);
-
-        if (dev->bus)
-                add_uevent_var(envp, num_envp, cur_index,
-                               buffer, buffer_size, cur_len,
-                               "PHYSDEVBUS=%s", dev->bus->name);
-
-        if (dev->driver)
-                add_uevent_var(envp, num_envp, cur_index,
-                               buffer, buffer_size, cur_len,
-                               "PHYSDEVDRIVER=%s", dev->driver->name);
-        return 0;
-}
-
 static int make_deprecated_class_device_links(struct class_device *class_dev)
 {
         char *class_name;
@@ -430,11 +400,6 @@ static void remove_deprecated_class_device_links(struct class_device *class_dev)
         kfree(class_name);
 }
 #else
-static inline int deprecated_class_uevent(char **envp, int num_envp,
-                                          int *cur_index, char *buffer,
-                                          int buffer_size, int *cur_len,
-                                          struct class_device *class_dev)
-{ return 0; }
 static inline int make_deprecated_class_device_links(struct class_device *cd)
 { return 0; }
 static void remove_deprecated_class_device_links(struct class_device *cd)
@@ -445,15 +410,13 @@ static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                          int num_envp, char *buffer, int buffer_size)
 {
         struct class_device *class_dev = to_class_dev(kobj);
+        struct device *dev = class_dev->dev;
         int i = 0;
         int length = 0;
         int retval = 0;
 
         pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);
 
-        deprecated_class_uevent(envp, num_envp, &i, buffer, buffer_size,
-                                &length, class_dev);
-
         if (MAJOR(class_dev->devt)) {
                 add_uevent_var(envp, num_envp, &i,
                                buffer, buffer_size, &length,
@@ -464,6 +427,26 @@ static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                                "MINOR=%u", MINOR(class_dev->devt));
         }
 
+        if (dev) {
+                const char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
+                if (path) {
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVPATH=%s", path);
+                        kfree(path);
+                }
+
+                if (dev->bus)
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVBUS=%s", dev->bus->name);
+
+                if (dev->driver)
+                        add_uevent_var(envp, num_envp, &i,
+                                       buffer, buffer_size, &length,
+                                       "PHYSDEVDRIVER=%s", dev->driver->name);
+        }
+
         /* terminate, set to next free slot, shrink available space */
         envp[i] = NULL;
         envp = &envp[i];
diff --git a/drivers/base/core.c b/drivers/base/core.c
index b78fc1e68264..dd40d78a023d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -180,10 +180,12 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                         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);
+                        if (path) {
+                                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,