openwrt/target/linux/generic-2.6/patches-2.6.22/060-block2mtd_init.patch

diff -urN linux-2.6.21.1.old/drivers/mtd/devices/block2mtd.c linux-2.6.21.1.dev/drivers/mtd/devices/block2mtd.c
--- linux-2.6.21.1.old/drivers/mtd/devices/block2mtd.c	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/drivers/mtd/devices/block2mtd.c	2007-05-26 20:06:13.547923960 +0200
@@ -16,6 +16,7 @@
 #include <linux/list.h>
 #include <linux/init.h>
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
 #include <linux/buffer_head.h>
 #include <linux/mutex.h>
 #include <linux/mount.h>
@@ -237,10 +238,11 @@
 
 
 /* FIXME: ensure that mtd->size % erase_size == 0 */
-static struct block2mtd_dev *add_device(char *devname, int erase_size)
+static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
 {
 	struct block_device *bdev;
 	struct block2mtd_dev *dev;
+	struct mtd_partition *part;
 
 	if (!devname)
 		return NULL;
@@ -279,14 +281,18 @@
 
 	/* Setup the MTD structure */
 	/* make the name contain the block device in */
-	dev->mtd.name = kmalloc(sizeof("block2mtd: ") + strlen(devname),
-			GFP_KERNEL);
+
+	if (!mtdname)
+		mtdname = devname;
+
+	dev->mtd.name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
+
 	if (!dev->mtd.name)
 		goto devinit_err;
+	
+	strcpy(dev->mtd.name, mtdname);
 
-	sprintf(dev->mtd.name, "block2mtd: %s", devname);
-
-	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.type = MTD_RAM;
@@ -298,15 +304,18 @@
 	dev->mtd.read = block2mtd_read;
 	dev->mtd.priv = dev;
 	dev->mtd.owner = THIS_MODULE;
-
-	if (add_mtd_device(&dev->mtd)) {
+	
+	part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
+	part->name = dev->mtd.name;
+	part->offset = 0;
+	part->size = dev->mtd.size;
+	if (add_mtd_partitions(&dev->mtd, part, 1)) {
 		/* Device didnt get added, so free the entry */
 		goto devinit_err;
 	}
 	list_add(&dev->list, &blkmtd_device_list);
 	INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
-			dev->mtd.name + strlen("blkmtd: "),
-			dev->mtd.erasesize >> 10, dev->mtd.erasesize);
+			mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
 	return dev;
 
 devinit_err:
@@ -379,9 +388,9 @@
 
 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;
@@ -392,7 +401,7 @@
 	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)
@@ -412,8 +421,10 @@
 			parse_err("illegal erase size");
 		}
 	}
+	if (token[2] && (strlen(token[2]) + 1 > 80))
+		parse_err("mtd device name too long");
 
-	add_device(name, erase_size);
+	add_device(name, erase_size, token[2]);
 
 	return 0;
 }
@@ -447,7 +458,7 @@
 
 
 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)
 {