i2c: copy device properties when using i2c_register_board_info()

This will allow marking device property lists as __initdata, the same as
board info structures themselves.

Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c
index 6e5fac6..0e285c6 100644 (file)
--- a/drivers/i2c/i2c-boardinfo.c
+++ b/drivers/i2c/i2c-boardinfo.c
@@ -15,6 +15,7 @@
 #include <linux/export.h>
 #include <linux/i2c.h>
 #include <linux/kernel.h>
+#include <linux/property.h>
 #include <linux/rwsem.h>
 #include <linux/slab.h>
 
@@ -55,6 +56,7 @@ EXPORT_SYMBOL_GPL(__i2c_first_dynamic_bus_num);
  *
  * The board info passed can safely be __initdata, but be careful of embedded
  * pointers (for platform_data, functions, etc) since that won't be copied.
+ * Device properties are deep-copied though.
  */
 int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned len)
 {
@@ -78,6 +80,16 @@ int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsig
 
                devinfo->busnum = busnum;
                devinfo->board_info = *info;
+
+               if (info->properties) {
+                       devinfo->board_info.properties =
+                                       property_entries_dup(info->properties);
+                       if (IS_ERR(devinfo->board_info.properties)) {
+                               status = PTR_ERR(devinfo->board_info.properties);
+                               break;
+                       }
+               }
+
                list_add_tail(&devinfo->list, &__i2c_board_list);
        }