linux-kernel - [PATCH 5.11 194/254] platform/x86: dell-wmi-sysman: Make sysman_init() return -ENODEV of the interfaces are not found

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Message-Id: <20210329075639.484312106@linuxfoundation.org>
Date:   Mon, 29 Mar 2021 09:58:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Divya Bharathi <Divya_Bharathi@...l.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Alexander Naumann <alexandernaumann@....de>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 194/254] platform/x86: dell-wmi-sysman: Make sysman_init() return -ENODEV of the interfaces are not found

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit 32418dd58c957f8fef25b97450d00275967604f1 ]

When either the attributes or the password interface is not found, then
unregister the 2 wmi drivers again and return -ENODEV from sysman_init().

Fixes: e8a60aa7404b ("platform/x86: Introduce support for Systems Management Driver over WMI for Dell Systems")
Cc: Divya Bharathi <Divya_Bharathi@...l.com>
Cc: Mario Limonciello <mario.limonciello@...l.com>
Reported-by: Alexander Naumann <alexandernaumann@....de>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Link: https://lore.kernel.org/r/20210321115901.35072-7-hdegoede@redhat.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/platform/x86/dell-wmi-sysman/sysman.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell-wmi-sysman/sysman.c
index 99dc2f3bdf49..5dd9b29d939c 100644
--- a/drivers/platform/x86/dell-wmi-sysman/sysman.c
+++ b/drivers/platform/x86/dell-wmi-sysman/sysman.c
@@ -506,15 +506,17 @@ static int __init sysman_init(void)
 	}
 
 	ret = init_bios_attr_set_interface();
-	if (ret || !wmi_priv.bios_attr_wdev) {
-		pr_debug("failed to initialize set interface\n");
+	if (ret)
 		return ret;
-	}
 
 	ret = init_bios_attr_pass_interface();
-	if (ret || !wmi_priv.password_attr_wdev) {
-		pr_debug("failed to initialize pass interface\n");
+	if (ret)
 		goto err_exit_bios_attr_set_interface;
+
+	if (!wmi_priv.bios_attr_wdev || !wmi_priv.password_attr_wdev) {
+		pr_debug("failed to find set or pass interface\n");
+		ret = -ENODEV;
+		goto err_exit_bios_attr_pass_interface;
 	}
 
 	ret = class_register(&firmware_attributes_class);
-- 
2.30.1