ksmbd: fix documentation for 2 functions

mainline inclusion
from mainline-5.15-rc4
commit 1018bf24
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I60T7G
CVE: NA

Reference: https://git.kernel.org/torvalds/linux/c/1018bf24550f

-------------------------------

ksmbd_kthread_fn() and create_socket() returns 0 or error code, and not
task_struct/ERR_PTR.
Signed-off-by: NEnzo Matsumiya <ematsumiya@suse.de>
Acked-by: NNamjae Jeon <linkinjeon@kernel.org>
Signed-off-by: NSteve French <stfrench@microsoft.com>
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NZhong Jinghua <zhongjinghua@huawei.com>

fs/ksmbd/transport_tcp.c

@@ -215,7 +215,7 @@ static int ksmbd_tcp_new_connection(struct socket *client_sk)
  * ksmbd_kthread_fn() - listen to new SMB connections and callback server
  * @p:		arguments to forker thread
  *
- * Return:	Returns a task_struct or ERR_PTR
+ * Return:	0 on success, error number otherwise
  */
 static int ksmbd_kthread_fn(void *p)
 {
@@ -387,7 +387,7 @@ static void tcp_destroy_socket(struct socket *ksmbd_socket)
 /**
  * create_socket - create socket for ksmbd/0
  *
- * Return:	Returns a task_struct or ERR_PTR
+ * Return:	0 on success, error number otherwise
  */
 static int create_socket(struct interface *iface)
 {