diff options
Diffstat (limited to 'drivers/mtd/mtdsuper.c')
| -rw-r--r-- | drivers/mtd/mtdsuper.c | 42 |
1 files changed, 19 insertions, 23 deletions
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c index 28cc6787a800..00d46e137b2a 100644 --- a/drivers/mtd/mtdsuper.c +++ b/drivers/mtd/mtdsuper.c @@ -125,8 +125,11 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags, int (*fill_super)(struct super_block *, void *, int), struct vfsmount *mnt) { - struct nameidata nd; - int mtdnr, ret; +#ifdef CONFIG_BLOCK + struct block_device *bdev; + int ret, major; +#endif + int mtdnr; if (!dev_name) return -EINVAL; @@ -178,45 +181,38 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags, } } +#ifdef CONFIG_BLOCK /* try the old way - the hack where we allowed users to mount * /dev/mtdblock$(n) but didn't actually _use_ the blockdev */ - ret = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); - - DEBUG(1, "MTDSB: path_lookup() returned %d, inode %p\n", - ret, nd.path.dentry ? nd.path.dentry->d_inode : NULL); - - if (ret) + bdev = lookup_bdev(dev_name); + if (IS_ERR(bdev)) { + ret = PTR_ERR(bdev); + DEBUG(1, "MTDSB: lookup_bdev() returned %d\n", ret); return ret; + } + DEBUG(1, "MTDSB: lookup_bdev() returned 0\n"); ret = -EINVAL; - if (!S_ISBLK(nd.path.dentry->d_inode->i_mode)) - goto out; - - if (nd.path.mnt->mnt_flags & MNT_NODEV) { - ret = -EACCES; - goto out; - } + major = MAJOR(bdev->bd_dev); + mtdnr = MINOR(bdev->bd_dev); + bdput(bdev); - if (imajor(nd.path.dentry->d_inode) != MTD_BLOCK_MAJOR) + if (major != MTD_BLOCK_MAJOR) goto not_an_MTD_device; - mtdnr = iminor(nd.path.dentry->d_inode); - path_put(&nd.path); - return get_sb_mtd_nr(fs_type, flags, dev_name, data, mtdnr, fill_super, mnt); not_an_MTD_device: +#endif /* CONFIG_BLOCK */ + if (!(flags & MS_SILENT)) printk(KERN_NOTICE "MTD: Attempt to mount non-MTD device \"%s\"\n", dev_name); -out: - path_put(&nd.path); - return ret; - + return -EINVAL; } EXPORT_SYMBOL_GPL(get_sb_mtd); |