linux-kernel - RE: [PATCH -next] drm/amdgpu: remove set but not used variable 'ring'

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Date:   Thu, 15 Nov 2018 11:49:12 +0000
From:   "Huang, Ray" <Ray.Huang@....com>
To:     YueHaibing <yuehaibing@...wei.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Zhou, David(ChunMing)" <David1.Zhou@....com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "Liu, Shaoyun" <Shaoyun.Liu@....com>,
        "Francis, David" <David.Francis@....com>,
        "Xu, Feifei" <Feifei.Xu@....com>, "Gao, Likun" <Likun.Gao@....com>
CC:     "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH -next] drm/amdgpu: remove set but not used variable 'ring'

> -----Original Message-----
> From: YueHaibing [mailto:yuehaibing@...wei.com]
> Sent: Thursday, November 15, 2018 6:52 PM
> To: Deucher, Alexander <Alexander.Deucher@....com>; Koenig, Christian
> <Christian.Koenig@....com>; Zhou, David(ChunMing)
> <David1.Zhou@....com>; airlied@...ux.ie; Liu, Shaoyun
> <Shaoyun.Liu@....com>; Francis, David <David.Francis@....com>; Huang,
> Ray <Ray.Huang@....com>; Xu, Feifei <Feifei.Xu@....com>; Gao, Likun
> <Likun.Gao@....com>
> Cc: YueHaibing <yuehaibing@...wei.com>; amd-gfx@...ts.freedesktop.org;
> dri-devel@...ts.freedesktop.org; linux-kernel@...r.kernel.org; kernel-
> janitors@...r.kernel.org
> Subject: [PATCH -next] drm/amdgpu: remove set but not used variable 'ring'
> 
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/gpu/drm/amd/amdgpu/psp_v10_0.c: In function
> 'psp_v10_0_ring_stop':
> drivers/gpu/drm/amd/amdgpu/psp_v10_0.c:230:19: warning:
>  variable 'ring' set but not used [-Wunused-but-set-variable]
> 
> It not used since commit
> 4ef72453311a ("drm/amdgpu: added api for stopping psp ring (v2)")

Thanks, please also remove the similar code in psp_v3_1. 
With that updates, patch is Reviewed-by: Huang Rui <ray.huang@....com>

> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/psp_v10_0.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
> b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
> index 295c220..d78b430 100644
> --- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
> @@ -240,12 +240,9 @@ static int psp_v10_0_ring_stop(struct psp_context
> *psp,
>  			       enum psp_ring_type ring_type)  {
>  	int ret = 0;
> -	struct psp_ring *ring;
>  	unsigned int psp_ring_reg = 0;
>  	struct amdgpu_device *adev = psp->adev;
> 
> -	ring = &psp->km_ring;
> -
>  	/* Write the ring destroy command to C2PMSG_64 */
>  	psp_ring_reg = 3 << 16;
>  	WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64, psp_ring_reg);
> 
> 
> 
>