netdev - [PATCH 3/4] thunderbolt: NHI can use HopIDs 1-7

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Date:   Mon, 15 Jun 2020 16:01:38 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     linux-usb@...r.kernel.org
Cc:     Michael Jamet <michael.jamet@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Andreas Noever <andreas.noever@...il.com>,
        Lukas Wunner <lukas@...ner.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org
Subject: [PATCH 3/4] thunderbolt: NHI can use HopIDs 1-7

NHI (The host interface adapter) is allowed to use HopIDs 1-7 as well so
relax the restriction in tb_port_alloc_hopid() to support this.

Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/thunderbolt/switch.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index d7d60cd9226f..95b75a712ade 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -789,8 +789,11 @@ static int tb_port_alloc_hopid(struct tb_port *port, bool in, int min_hopid,
 		ida = &port->out_hopids;
 	}
 
-	/* HopIDs 0-7 are reserved */
-	if (min_hopid < TB_PATH_MIN_HOPID)
+	/*
+	 * NHI can use HopIDs 1-max for other adapters HopIDs 0-7 are
+	 * reserved.
+	 */
+	if (port->config.type != TB_TYPE_NHI && min_hopid < TB_PATH_MIN_HOPID)
 		min_hopid = TB_PATH_MIN_HOPID;
 
 	if (max_hopid < 0 || max_hopid > port_max_hopid)
-- 
2.27.0.rc2