From d26694243af236fed09a4b38f3cc68e40ad063b5 Mon Sep 17 00:00:00 2001
From: Imre Kaloz <kaloz@openwrt.org>
Date: Sun, 25 Jan 2015 15:20:39 +0000
Subject: generic: add preliminary 3.19 support
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
SVN-Revision: 44126
---
.../generic/patches-3.19/440-block2mtd_init.patch | 107 +++++++++++++++++++++
1 file changed, 107 insertions(+)
create mode 100644 target/linux/generic/patches-3.19/440-block2mtd_init.patch
(limited to 'target/linux/generic/patches-3.19/440-block2mtd_init.patch')
diff --git a/target/linux/generic/patches-3.19/440-block2mtd_init.patch b/target/linux/generic/patches-3.19/440-block2mtd_init.patch
new file mode 100644
index 0000000..5ab6026
--- /dev/null
+++ b/target/linux/generic/patches-3.19/440-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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