From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../generic/patches-4.0/440-block2mtd_init.patch   | 107 +++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 target/linux/generic/patches-4.0/440-block2mtd_init.patch

(limited to 'target/linux/generic/patches-4.0/440-block2mtd_init.patch')

diff --git a/target/linux/generic/patches-4.0/440-block2mtd_init.patch b/target/linux/generic/patches-4.0/440-block2mtd_init.patch
new file mode 100644
index 0000000..5ab6026
--- /dev/null
+++ b/target/linux/generic/patches-4.0/440-block2mtd_init.patch
@@ -0,0 +1,107 @@
+--- a/drivers/mtd/devices/block2mtd.c
++++ b/drivers/mtd/devices/block2mtd.c
+@@ -17,6 +17,7 @@
+ #include <linux/list.h>
+ #include <linux/init.h>
+ #include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
+ #include <linux/mutex.h>
+ #include <linux/mount.h>
+ #include <linux/slab.h>
+@@ -209,11 +210,12 @@ static void block2mtd_free_device(struct
+ }
+ 
+ 
+-static struct block2mtd_dev *add_device(char *devname, int erase_size)
++static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
+ {
+ 	const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
+ 	struct block_device *bdev;
+ 	struct block2mtd_dev *dev;
++	struct mtd_partition *part;
+ 	char *name;
+ 
+ 	if (!devname)
+@@ -257,13 +259,16 @@ static struct block2mtd_dev *add_device(
+ 
+ 	/* Setup the MTD structure */
+ 	/* make the name contain the block device in */
+-	name = kasprintf(GFP_KERNEL, "block2mtd: %s", devname);
++	if (!mtdname)
++		mtdname = devname;
++	name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
+ 	if (!name)
+ 		goto err_destroy_mutex;
+ 
++	strcpy(name, mtdname);
+ 	dev->mtd.name = name;
+ 
+-	dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
++	dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
+ 	dev->mtd.erasesize = erase_size;
+ 	dev->mtd.writesize = 1;
+ 	dev->mtd.writebufsize = PAGE_SIZE;
+@@ -276,15 +281,18 @@ static struct block2mtd_dev *add_device(
+ 	dev->mtd.priv = dev;
+ 	dev->mtd.owner = THIS_MODULE;
+ 
+-	if (mtd_device_register(&dev->mtd, NULL, 0)) {
++	part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
++	part->name = name;
++	part->offset = 0;
++	part->size = dev->mtd.size;
++	if (mtd_device_register(&dev->mtd, part, 1)) {
+ 		/* Device didn't get added, so free the entry */
+ 		goto err_destroy_mutex;
+ 	}
+ 	list_add(&dev->list, &blkmtd_device_list);
+ 	pr_info("mtd%d: [%s] erase_size = %dKiB [%d]\n",
+ 		dev->mtd.index,
+-		dev->mtd.name + strlen("block2mtd: "),
+-		dev->mtd.erasesize >> 10, dev->mtd.erasesize);
++		mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
+ 	return dev;
+ 
+ err_destroy_mutex:
+@@ -353,9 +361,9 @@ static char block2mtd_paramline[80 + 12]
+ 
+ static int block2mtd_setup2(const char *val)
+ {
+-	char buf[80 + 12]; /* 80 for device, 12 for erase size */
++	char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
+ 	char *str = buf;
+-	char *token[2];
++	char *token[3];
+ 	char *name;
+ 	size_t erase_size = PAGE_SIZE;
+ 	int i, ret;
+@@ -368,7 +376,7 @@ static int block2mtd_setup2(const char *
+ 	strcpy(str, val);
+ 	kill_final_newline(str);
+ 
+-	for (i = 0; i < 2; i++)
++	for (i = 0; i < 3; i++)
+ 		token[i] = strsep(&str, ",");
+ 
+ 	if (str) {
+@@ -394,8 +402,10 @@ static int block2mtd_setup2(const char *
+ 			return 0;
+ 		}
+ 	}
++	if (token[2] && (strlen(token[2]) + 1 > 80))
++		pr_err("mtd device name too long\n");
+ 
+-	add_device(name, erase_size);
++	add_device(name, erase_size, token[2]);
+ 
+ 	return 0;
+ }
+@@ -429,7 +439,7 @@ static int block2mtd_setup(const char *v
+ 
+ 
+ module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
+-MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
++MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
+ 
+ static int __init block2mtd_init(void)
+ {
-- 
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