linux-kernel - [PATCH 1/5] thunderbolt: Skip disabled ports on tunnel establishment

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Date:   Sun, 9 Sep 2018 23:42:01 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     Andreas Noever <andreas.noever@...il.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] thunderbolt: Skip disabled ports on tunnel establishment

If a PCIe downstream adapter is marked disabled in the DROM, that port
is ineligible for tunnel establishment, so skip over it when searching
for an unused port.

Signed-off-by: Lukas Wunner <lukas@...ner.de>
---
 drivers/thunderbolt/tb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 1424581fd9af..0da2e7a06ab5 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -147,6 +147,8 @@ static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw)
 	int res;
 	int data;
 	for (i = 1; i <= sw->config.max_port_number; i++) {
+		if (sw->ports[i].disabled)
+			continue;
 		if (tb_is_upstream_port(&sw->ports[i]))
 			continue;
 		if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN)
-- 
2.18.0