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Commit 636c0371 authored by Ying Xue's avatar Ying Xue Committed by David S. Miller
Browse files

tipc: correct return value of link_cmd_set_value routine 



link_cmd_set_value() takes commands for link, bearer and media related
configuration. Genereally the function returns 0 when a command is
recognized, and -EINVAL when it is not. However, in the switch for link
related commands it returns 0 even when the command is unrecognized. This
will sometimes make it look as if a failed configuration command has been
successful, but has otherwise no negative effects.

We remove this anomaly by returning -EINVAL even for link commands. We also
rework all three switches to make them  conforming to common kernel coding
style.

Signed-off-by: default avatarYing Xue <ying.xue@windriver.com>
Reviewed-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 67981583

net/tipc/link.c

+19 −9
Original line number Diff line number Diff line
@@ -2641,6 +2641,7 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) 
	struct tipc_link *l_ptr;

	struct tipc_bearer *b_ptr;

	struct tipc_media *m_ptr;

	int res = 0;



	l_ptr = link_find_link(name, &node);

	if (l_ptr) {
@@ -2663,9 +2664,12 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) 
		case TIPC_CMD_SET_LINK_WINDOW:

			tipc_link_set_queue_limits(l_ptr, new_value);

			break;

		default:

			res = -EINVAL;

			break;

		}

		tipc_node_unlock(node);

		return 0;

		return res;

	}



	b_ptr = tipc_bearer_find(name);
@@ -2673,15 +2677,18 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) 
		switch (cmd) {

		case TIPC_CMD_SET_LINK_TOL:

			b_ptr->tolerance = new_value;

			return 0;

			break;

		case TIPC_CMD_SET_LINK_PRI:

			b_ptr->priority = new_value;

			return 0;

			break;

		case TIPC_CMD_SET_LINK_WINDOW:

			b_ptr->window = new_value;

			return 0;

			break;

		default:

			res = -EINVAL;

			break;

		}

		return -EINVAL;

		return res;

	}



	m_ptr = tipc_media_find(name);
@@ -2690,15 +2697,18 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) 
	switch (cmd) {

	case TIPC_CMD_SET_LINK_TOL:

		m_ptr->tolerance = new_value;

		return 0;

		break;

	case TIPC_CMD_SET_LINK_PRI:

		m_ptr->priority = new_value;

		return 0;

		break;

	case TIPC_CMD_SET_LINK_WINDOW:

		m_ptr->window = new_value;

		return 0;

		break;

	default:

		res = -EINVAL;

		break;

	}

	return -EINVAL;

	return res;

}



struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space,