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Revert "mtd: switch open_mtd_by_chdev() to use of vfs_stat()"
This reverts commit 87f15d4add
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vfs_stat() can only be used on user supplied buffers.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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parent
ad022c8718
commit
1a498ec45e
1 changed files with 8 additions and 5 deletions
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@ -1147,19 +1147,22 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
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*/
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static struct mtd_info * __init open_mtd_by_chdev(const char *mtd_dev)
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{
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struct kstat stat;
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int err, minor;
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int err, major, minor, mode;
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struct path path;
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/* Probably this is an MTD character device node path */
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err = vfs_stat(mtd_dev, &stat);
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err = kern_path(mtd_dev, LOOKUP_FOLLOW, &path);
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if (err)
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return ERR_PTR(err);
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/* MTD device number is defined by the major / minor numbers */
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if (MAJOR(stat.rdev) != MTD_CHAR_MAJOR || !S_ISCHR(stat.mode))
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major = imajor(d_backing_inode(path.dentry));
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minor = iminor(d_backing_inode(path.dentry));
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mode = d_backing_inode(path.dentry)->i_mode;
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path_put(&path);
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if (major != MTD_CHAR_MAJOR || !S_ISCHR(mode))
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return ERR_PTR(-EINVAL);
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minor = MINOR(stat.rdev);
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if (minor & 1)
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/*
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* Just do not think the "/dev/mtdrX" devices support is need,
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