linux-kernel - [PATCH] i2c: copy device properties when using i2c_register_board

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Message-ID: <20170228043545.GA26287@dtor-ws>
Date:   Mon, 27 Feb 2017 20:35:45 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] 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.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/i2c/i2c-boardinfo.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c
index 6e5fac6a5262..ccb172423ad4 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 +80,11 @@ int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsig
 
 		devinfo->busnum = busnum;
 		devinfo->board_info = *info;
+		devinfo->board_info.properties =
+			property_entries_dup(info->properties);
+		if (IS_ERR(devinfo->board_info.properties))
+			return PTR_ERR(devinfo->board_info.properties);
+
 		list_add_tail(&devinfo->list, &__i2c_board_list);
 	}
 
-- 
2.11.0.483.g087da7b7c-goog


-- 
Dmitry