thunderbolt: Check that both ports are reachable when allocating path (7e897bb7) · Commits · 戴 / test

drivers/thunderbolt/path.c

+13 −2

Original line number	Diff line number	Diff line
		@@ -229,7 +229,7 @@ struct tb_path tb_path_alloc(struct tb tb, struct tb_port *src, int src_hopid,
		struct tb_port *dst, int dst_hopid, int link_nr,
		const char *name)
		{
		struct tb_port in_port, out_port;
		struct tb_port in_port, out_port, first_port, last_port;
		int in_hopid, out_hopid;
		struct tb_path *path;
		size_t num_hops;
		@@ -239,9 +239,20 @@ struct tb_path tb_path_alloc(struct tb tb, struct tb_port *src, int src_hopid,
		if (!path)
		return NULL;

		first_port = last_port = NULL;
		i = 0;
		tb_for_each_port_on_path(src, dst, in_port)
		tb_for_each_port_on_path(src, dst, in_port) {
		if (!first_port)
		first_port = in_port;
		last_port = in_port;
		i++;
		}

		/* Check that src and dst are reachable */
		if (first_port != src \|\| last_port != dst) {
		kfree(path);
		return NULL;
		}

		/* Each hop takes two ports */
		num_hops = i / 2;