linux-kernel - [PATCH 05/12] thunderbolt: Return -ENOTCONN when ERR

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Date:   Thu, 19 Nov 2020 18:55:16 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     Yehezkel Bernat <YehezkelShB@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Andreas Noever <andreas.noever@...il.com>,
        Lukas Wunner <lukas@...ner.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH 05/12] thunderbolt: Return -ENOTCONN when ERR_CONN is received

This allows the calling code to distinguish if the error was due to
ERR_CONN (adapter is disconneced or disabled) or something else. Will be
needed in USB4 router NVM update in the following patch.

Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/thunderbolt/ctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index 1d86e27a0ef3..bac08b820015 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -962,6 +962,9 @@ static int tb_cfg_get_error(struct tb_ctl *ctl, enum tb_cfg_space space,
 
 	if (res->tb_error == TB_CFG_ERROR_LOCK)
 		return -EACCES;
+	else if (res->tb_error == TB_CFG_ERROR_PORT_NOT_CONNECTED)
+		return -ENOTCONN;
+
 	return -EIO;
 }
 
-- 
2.29.2