[PATCH] drm/amd/powerplay: fix locking in smu_feature_set_supported()

[PATCH] drm/amd/powerplay: fix locking in smu_feature_set_supported()

[Dan Carpenter]

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@oracle.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

RE: [PATCH] drm/amd/powerplay: fix locking in smu_feature_set_supported()

[Huang, Ray]

> -----Original Message-----
> From: Dan Carpenter <dan.carpenter@oracle.com>
> Sent: Wednesday, May 15, 2019 5:52 PM
> To: Deucher, Alexander <Alexander.Deucher@amd.com>; Wang, Kevin(Yang)
> <Kevin1.Wang@amd.com>
> Cc: Koenig, Christian <Christian.Koenig@amd.com>; Zhou, David(ChunMing)
> <David1.Zhou@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter
> <daniel@ffwll.ch>; Huang, Ray <Ray.Huang@amd.com>; Gao, Likun
> <Likun.Gao@amd.com>; Gui, Jack <Jack.Gui@amd.com>; amd-
> gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-
> kernel@vger.kernel.org; kernel-janitors@vger.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@oracle.com>
> 

Thanks!
Reviewed-by: Huang Rui <ray.huang@amd.com>

Will apply it.

---
>  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