[4.2.y-ckt stable] Patch "drm/nouveau/bios/fan: hardcode the fan mode to linear" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    drm/nouveau/bios/fan: hardcode the fan mode to linear

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt2.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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>From 43cb61c15948441eb9f386dcdd6d177a1bab4f75 Mon Sep 17 00:00:00 2001
From: Martin Peres <martin.peres at free.fr>
Date: Sun, 29 Nov 2015 16:10:18 +0200
Subject: drm/nouveau/bios/fan: hardcode the fan mode to linear
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit a814a29d7bbfdfe56fe1bb9641a185077066eb9f upstream.

This is an oversight that made use of the trip-point-based fan managenent on
cards that never expose those. This led the fan to stay at fan_min.

Fortunately, the emergency code would kick when the temperature would reach
90°C.

Reported-by: Tom Englund <tomenglund26 at gmail.com>
Tested-by: Tom Englund <tomenglund26 at gmail.com>
Signed-off-by: Martin Peres <martin.peres at free.fr>
Tested-by: Daemon32 <lnf.purple at gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92126
Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
index 8dba70d..e089752 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
@@ -83,6 +83,7 @@ nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
 			fan->type = NVBIOS_THERM_FAN_UNK;
 		}

+		fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
 		fan->min_duty = nv_ro08(bios, data + 0x02);
 		fan->max_duty = nv_ro08(bios, data + 0x03);

--
1.9.1