--- 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) {