linux-kernel - [PATCH] drm/amd/powerplay: fix locking in smu_feature_set

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Message-ID: <20190515095130.GF3409@mwanda>
Date:   Wed, 15 May 2019 12:51:30 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Kevin Wang <kevin1.wang@....com>
Cc:     Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Huang Rui <ray.huang@....com>,
        Likun Gao <Likun.Gao@....com>,
        Chengming Gui <Jack.Gui@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] drm/amd/powerplay: fix locking in smu_feature_set_supported()

There is a typo so the code unlocks twice instead of taking the lock and
then releasing it.

Fixes: f14a323db5b0 ("drm/amd/powerplay: implement update enabled feature state to smc for smu11")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 52d919a8b70a..85ac29af5363 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -310,7 +310,7 @@ int smu_feature_set_supported(struct smu_context *smu, int feature_id,
 
 	WARN_ON(feature_id > feature->feature_num);
 
-	mutex_unlock(&feature->mutex);
+	mutex_lock(&feature->mutex);
 	if (enable)
 		test_and_set_bit(feature_id, feature->supported);
 	else
-- 
2.20.1