linux-kernel - [PATCH 4.2.y-ckt 228/305] drm/nouveau/bios/fan: hardcode the fan mode to linear

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Message-Id: <1452902519-2754-229-git-send-email-kamal@canonical.com>
Date:	Fri, 15 Jan 2016 16:00:42 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Martin Peres <martin.peres@...e.fr>,
	Ben Skeggs <bskeggs@...hat.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 228/305] drm/nouveau/bios/fan: hardcode the fan mode to linear

4.2.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Martin Peres <martin.peres@...e.fr>

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@...il.com>
Tested-by: Tom Englund <tomenglund26@...il.com>
Signed-off-by: Martin Peres <martin.peres@...e.fr>
Tested-by: Daemon32 <lnf.purple@...il.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92126
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.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