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devpts: Must release s_umount on error 

We should drop the ->s_umount mutex if an error occurs after the
sget()/grab_super() call. This was introduced when adding support
for multiple instances of devpts and noticed during a code review/reorg.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Sukadev Bhattiprolu 2009-01-28 16:57:12 -08:00 committed by Al Viro
parent af5df56688
commit a9f184f02a
1 changed files with 2 additions and 0 deletions
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2
fs/devpts/inode.c
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@ -385,6 +385,7 @@ static int new_pts_mount(struct file_system_type *fs_type, int flags,
fail:
dput(mnt->mnt_sb->s_root);
up_write(&mnt->mnt_sb->s_umount);
deactivate_super(mnt->mnt_sb);
return err;
}
@ -473,6 +474,7 @@ static int init_pts_mount(struct file_system_type *fs_type, int flags,
err = mknod_ptmx(mnt->mnt_sb);
if (err) {
dput(mnt->mnt_sb->s_root);
up_write(&mnt->mnt_sb->s_umount);
deactivate_super(mnt->mnt_sb);
}