Commit c738a794 authored May 08, 2020 by Mika Westerberg

thunderbolt: Increase path length in discovery

Currently we have only supported paths that follow daisy-chain topology
but USB4 also allows to build trees of devices. For this reason increase
maximum path length we use for discovery to be from the lowest level to
the host router and back to the same level.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

parent 75ab3f06

drivers/thunderbolt/tb.h

+5 −1

Original line number	Diff line number	Diff line
		@@ -286,7 +286,11 @@ struct tb_path {

		/* HopIDs 0-7 are reserved by the Thunderbolt protocol */
		#define TB_PATH_MIN_HOPID 8
		#define TB_PATH_MAX_HOPS 7
		/*
		* Support paths from the farthest (depth 6) router to the host and back
		* to the same level (not necessarily to the same router).
		*/
		#define TB_PATH_MAX_HOPS (7 * 2)

		/**
		* struct tb_cm_ops - Connection manager specific operations vector

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