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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Sanjay R Mehta <sanju.mehta@amd.com>,
        Basavaraj Natikar <Basavaraj.Natikar@amd.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Sasha Levin <sashal@kernel.org>, linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 5.14 134/252] thunderbolt: Fix port linking by checking all adapters
Date:   Thu,  9 Sep 2021 07:39:08 -0400
Message-Id: <20210909114106.141462-134-sashal@kernel.org>
In-Reply-To: <20210909114106.141462-1-sashal@kernel.org>
References: <20210909114106.141462-1-sashal@kernel.org>
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From: Sanjay R Mehta <sanju.mehta@amd.com>

[ Upstream commit 42716425ad7e1b6529ec61c260c11176841f4b5f ]

In tb_switch_default_link_ports(), while linking of ports,
only odd-numbered ports (1,3,5..) are considered and even-numbered
ports are not considered.

AMD host router has lane adapters at 2 and 3 and link ports at adapter 2
is not considered due to which lane bonding gets disabled.

Hence added a fix such that all ports are considered during
linking of ports.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/thunderbolt/switch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 10d6b228cc94..eec59030c3a7 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2443,7 +2443,7 @@ static void tb_switch_default_link_ports(struct tb_switch *sw)
 {
 	int i;
 
-	for (i = 1; i <= sw->config.max_port_number; i += 2) {
+	for (i = 1; i <= sw->config.max_port_number; i++) {
 		struct tb_port *port = &sw->ports[i];
 		struct tb_port *subordinate;
 
-- 
2.30.2