linux-kernel - Re: [PATCH -next v2] drm/amdgpu: return 'ret' in amdgpu_pmu

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Date:   Sun, 23 Jun 2019 20:46:55 -0700
From:   Joe Perches <joe@...ches.com>
To:     maowenan <maowenan@...wei.com>, airlied@...ux.ie, daniel@...ll.ch,
        alexander.deucher@....com, christian.koenig@....com,
        David1.Zhou@....com, dan.carpenter@...cle.com, julia.lawall@...6.fr
Cc:     kernel-janitors@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Jonathan Kim <jonathan.kim@....com>
Subject: Re: [PATCH -next v2] drm/amdgpu: return 'ret' in amdgpu_pmu_init

On Mon, 2019-06-24 at 11:41 +0800, maowenan wrote:
> 
> On 2019/6/23 2:13, Joe Perches wrote:
> > On Sat, 2019-06-22 at 21:05 +0800, Mao Wenan wrote:
> > > There is one warning:
> > > drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c: In function ‘amdgpu_pmu_init’:
> > > drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c:249:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
> > >   int ret = 0;
> > []
> > >  v1->v2: change the subject for this patch; change the indenting when it calls init_pmu_by_type; use the value 'ret' in
> > >  amdgpu_pmu_init().
> > []
> > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c
> > []
> > > @@ -252,8 +252,8 @@ int amdgpu_pmu_init(struct amdgpu_device *adev)
> > >  	case CHIP_VEGA20:
> > >  		/* init df */
> > >  		ret = init_pmu_by_type(adev, df_v3_6_attr_groups,
> > > -				       "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF,
> > > -				       DF_V3_6_MAX_COUNTERS);
> > > +							   "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF,
> > > +							   DF_V3_6_MAX_COUNTERS);
> > 
> > trivia:
> > 
> > The indentation change seems superfluous and
> > appears to make the code harder to read.
> > 
> > You could also cc Jonathan Kim who wrote all of this.
> I think this is just display issue in mail format. It is correct that in vi/vim.
> The arguments are line up with '(' after my change.

Use 8 character tabs and try again please.

> @@ -252,8 +252,8 @@ int amdgpu_pmu_init(struct amdgpu_device *adev)$
>  ^Icase CHIP_VEGA20:$
>  ^I^I/* init df */$
>  ^I^Iret = init_pmu_by_type(adev, df_v3_6_attr_groups,$
> -^I^I^I^I       "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF,$
> -^I^I^I^I       DF_V3_6_MAX_COUNTERS);$
> +^I^I^I^I^I^I^I   "DF", "amdgpu_df", PERF_TYPE_AMDGPU_DF,$
> +^I^I^I^I^I^I^I   DF_V3_6_MAX_COUNTERS);$