Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: saving negative to unsigned char
  9p: return on mutex_lock_interruptible()
  9p: Creating files with names too long should fail with ENAMETOOLONG.
  9p: Make sure we are able to clunk the cached fid on umount
  9p: drop nlink remove
  fs/9p: Clunk the fid resulting from partial walk of the name
  9p: documentation update
  9p: Fix setting of protocol flags in v9fs_session_info structure.

fs/9p/vfs_inode.c

@@ -432,6 +432,7 @@ error:
 
 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
 {
+	int retval;
 	struct inode *file_inode;
 	struct v9fs_session_info *v9ses;
 	struct p9_fid *v9fid;
@@ -445,7 +446,10 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
 	if (IS_ERR(v9fid))
 		return PTR_ERR(v9fid);
 
-	return p9_client_remove(v9fid);
+	retval = p9_client_remove(v9fid);
+	if (!retval)
+		drop_nlink(file_inode);
+	return retval;
 }
 
 static int
@@ -657,6 +661,9 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 	P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
 		dir, dentry->d_name.name, dentry, nameidata);
 
+	if (dentry->d_name.len > NAME_MAX)
+		return ERR_PTR(-ENAMETOOLONG);
+
 	sb = dir->i_sb;
 	v9ses = v9fs_inode2v9ses(dir);
 	dfid = v9fs_fid_lookup(dentry->d_parent);