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authorRichard Weinberger <richard@nod.at>2016-06-13 00:49:03 +0200
committerRichard Weinberger <richard@nod.at>2016-06-14 10:51:42 +0200
commit1a498ec45eeabcb246c3c3f5822ed9ac1b4f70d8 (patch)
treea5896d3a06815735df07a090adeecef2646e24ec /drivers/mtd/ubi
parentad022c87187b50f50937bd9bcd1ef312442a89af (diff)
Revert "mtd: switch open_mtd_by_chdev() to use of vfs_stat()"
This reverts commit 87f15d4add758fb7fc76655721af94be57a4c17d. 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>
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/build.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 16baeb51b2bd..7091fca0fb44 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1147,19 +1147,22 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
*/
static struct mtd_info * __init open_mtd_by_chdev(const char *mtd_dev)
{
- struct kstat stat;
- int err, minor;
+ int err, major, minor, mode;
+ struct path path;
/* Probably this is an MTD character device node path */
- err = vfs_stat(mtd_dev, &stat);
+ err = kern_path(mtd_dev, LOOKUP_FOLLOW, &path);
if (err)
return ERR_PTR(err);
/* MTD device number is defined by the major / minor numbers */
- if (MAJOR(stat.rdev) != MTD_CHAR_MAJOR || !S_ISCHR(stat.mode))
+ major = imajor(d_backing_inode(path.dentry));
+ minor = iminor(d_backing_inode(path.dentry));
+ mode = d_backing_inode(path.dentry)->i_mode;
+ path_put(&path);
+ if (major != MTD_CHAR_MAJOR || !S_ISCHR(mode))
return ERR_PTR(-EINVAL);
- minor = MINOR(stat.rdev);
if (minor & 1)
/*
* Just do not think the "/dev/mtdrX" devices support is need,