linux-kernel - [PATCH 4.4 257/342] hwmon: (dell-smm) Blacklist Dell Studio XPS 8000

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Message-Id: <20160301234536.209520222@linuxfoundation.org>
Date:	Tue, 01 Mar 2016 23:55:10 +0000
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	<linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<stable@...r.kernel.org>, Thorsten Leemhuis <linux@...mhuis.info>,
	Pali Rohár <pali.rohar@...il.com>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.4 257/342] hwmon: (dell-smm) Blacklist Dell Studio XPS 8000

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thorsten Leemhuis <linux@...mhuis.info>

commit 6220f4ebd7b4db499238c2dc91268a9c473fd01c upstream.

Since Linux 4.0 the CPU fan speed is going up and down on Dell Studio
XPS 8000 and 8100 for unknown reasons. The 8100 was already
blacklisted in commit a4b45b25f18d ("hwmon: (dell-smm) Blacklist
Dell Studio XPS 8100"). This patch blacklists the XPS 8000.

Without further debugging on the affected machine, it is not possible
to find the problem. For more details see
https://bugzilla.kernel.org/show_bug.cgi?id=100121

Signed-off-by: Thorsten Leemhuis <linux@...mhuis.info>
Acked-by: Pali Rohár <pali.rohar@...il.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwmon/dell-smm-hwmon.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -932,6 +932,17 @@ MODULE_DEVICE_TABLE(dmi, i8k_dmi_table);
 static struct dmi_system_id i8k_blacklist_dmi_table[] __initdata = {
 	{
 		/*
+		 * CPU fan speed going up and down on Dell Studio XPS 8000
+		 * for unknown reasons.
+		 */
+		.ident = "Dell Studio XPS 8000",
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"),
+		},
+	},
+	{
+		/*
 		 * CPU fan speed going up and down on Dell Studio XPS 8100
 		 * for unknown reasons.
 		 */