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path: root/drivers/mtd/mtdsuper.c
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Diffstat (limited to 'drivers/mtd/mtdsuper.c')
-rw-r--r--drivers/mtd/mtdsuper.c42
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);