From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Tue, 28 Feb 2017 04:09:09 +0000 (-0800)
Subject: i2c: copy device properties when using i2c_register_board_info()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0daaf99d8424f12cdf87e00c435c9cb93667f519;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 6e5fac6a5262..0e285c68b2ff 100644
--- 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);
 	}