Commit c4ff1443 authored Sep 04, 2023 by Mika Westerberg

thunderbolt: Introduce tb_switch_depth()



This is useful helper to find out the depth of a connected router.
Convert the existing users to call this helper instead of open-coding.

No functional changes.

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

parent 956c3abe

drivers/thunderbolt/tb.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -255,13 +255,13 @@ static int tb_enable_clx(struct tb_switch *sw)
		* this in the future to cover the whole topology if it turns
		* out to be beneficial.
		*/
		while (sw && sw->config.depth > 1)
		while (sw && tb_switch_depth(sw) > 1)
		sw = tb_switch_parent(sw);

		if (!sw)
		return 0;

		if (sw->config.depth != 1)
		if (tb_switch_depth(sw) != 1)
		return 0;

		/*

drivers/thunderbolt/tb.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -866,6 +866,15 @@ static inline struct tb_port tb_switch_downstream_port(struct tb_switch sw)
		return tb_port_at(tb_route(sw), tb_switch_parent(sw));
		}

		/**
		* tb_switch_depth() - Returns depth of the connected router
		* @sw: Router
		*/
		static inline int tb_switch_depth(const struct tb_switch *sw)
		{
		return sw->config.depth;
		}

		static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
		{
		return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&