kernel: backport upstream mtdpart.c cleanups

Except for renames and line changes the only conflict was in
allocate_partition in handling MTD_WRITEABLE. Hopefully it was handled
correctly.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/generic/patches-4.9/064-v4.11-0002-mtd-Add-partition-device-node-to-mtd-partition-devic.patch b/target/linux/generic/patches-4.9/064-v4.11-0002-mtd-Add-partition-device-node-to-mtd-partition-devic.patch
new file mode 100644
index 0000000000..ea68fc474f
--- /dev/null
+++ b/target/linux/generic/patches-4.9/064-v4.11-0002-mtd-Add-partition-device-node-to-mtd-partition-devic.patch
@@ -0,0 +1,50 @@
+From 42e9401bd1467d22c4dc4d2c637347b874e6a80b Mon Sep 17 00:00:00 2001
+From: Sascha Hauer <s.hauer@pengutronix.de>
+Date: Thu, 9 Feb 2017 11:50:24 +0100
+Subject: [PATCH] mtd: Add partition device node to mtd partition devices
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The user visible change here is that mtd partitions get an of_node link
+in sysfs.
+
+Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
+Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+Signed-off-by: Brian Norris <computersforpeace@gmail.com>
+---
+ drivers/mtd/mtdpart.c          | 1 +
+ drivers/mtd/ofpart.c           | 1 +
+ include/linux/mtd/partitions.h | 1 +
+ 3 files changed, 3 insertions(+)
+
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -432,6 +432,7 @@ static struct mtd_part *allocate_partiti
+ 	slave->mtd.dev.parent = IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) ?
+ 				&master->dev :
+ 				master->dev.parent;
++	slave->mtd.dev.of_node = part->of_node;
+ 
+ 	slave->mtd._read = part_read;
+ 	slave->mtd._write = part_write;
+--- a/drivers/mtd/ofpart.c
++++ b/drivers/mtd/ofpart.c
+@@ -108,6 +108,7 @@ static int parse_ofpart_partitions(struc
+ 
+ 		parts[i].offset = of_read_number(reg, a_cells);
+ 		parts[i].size = of_read_number(reg + a_cells, s_cells);
++		parts[i].of_node = pp;
+ 
+ 		partname = of_get_property(pp, "label", &len);
+ 		if (!partname)
+--- a/include/linux/mtd/partitions.h
++++ b/include/linux/mtd/partitions.h
+@@ -41,6 +41,7 @@ struct mtd_partition {
+ 	uint64_t size;			/* partition size */
+ 	uint64_t offset;		/* offset within the master MTD space */
+ 	uint32_t mask_flags;		/* master MTD flags to mask out for this partition */
++	struct device_node *of_node;
+ };
+ 
+ #define MTDPART_OFS_RETAIN	(-3)