linux-kernel - [PATCH] hwmon: (dell-smm) Add XPS 15 L502X to fan control blacklist

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Date:   Sat, 23 Jan 2021 18:46:08 -0800
From:   Thomas Hebb <tommyhebb@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Hebb <tommyhebb@...il.com>, stable@...r.kernel.org,
        Bob Hepple <bob.hepple@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>,
        Pali Rohár <pali@...nel.org>,
        linux-hwmon@...r.kernel.org
Subject: [PATCH] hwmon: (dell-smm) Add XPS 15 L502X to fan control blacklist

It has been reported[0] that the Dell XPS 15 L502X exhibits similar
freezing behavior to the other systems[1] on this blacklist. The issue
was exposed by a prior change of mine to automatically load
dell_smm_hwmon on a wider set of XPS models. To fix the regression, add
this model to the blacklist.

[0] https://bugzilla.kernel.org/show_bug.cgi?id=211081
[1] https://bugzilla.kernel.org/show_bug.cgi?id=195751

Fixes: b8a13e5e8f37 ("hwmon: (dell-smm) Use one DMI match for all XPS models")
Cc: stable@...r.kernel.org
Reported-by: Bob Hepple <bob.hepple@...il.com>
Tested-by: Bob Hepple <bob.hepple@...il.com>
Signed-off-by: Thomas Hebb <tommyhebb@...il.com>
---

 drivers/hwmon/dell-smm-hwmon.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index ec448f5f2dc3..73b9db9e3aab 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -1159,6 +1159,13 @@ static struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initdata = {
 			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
 		},
 	},
+	{
+		.ident = "Dell XPS 15 L502X",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L502X"),
+		},
+	},
 	{ }
 };
 
-- 
2.30.0