linux-kernel - Re: [PATCH V2] amdgpu: remove unnecessary condition check

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Date:   Tue, 21 Apr 2020 09:15:13 +0200
From:   Christian König <christian.koenig@....com>
To:     1587180037-113840-1-git-send-email-bernard@...o.com,
        Felix Kuehling <Felix.Kuehling@....com>,
        Alex Deucher <alexander.deucher@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Bernard Zhao <bernard@...o.com>
Subject: Re: [PATCH V2] amdgpu: remove unnecessary condition check

Am 21.04.20 um 04:41 schrieb Bernard Zhao:
> There is no need to if check again, maybe we could merge
> into the above else branch.
>
> Signed-off-by: Bernard Zhao <bernard@...o.com>
>
> ---
> Changes since V1:
> *commit message improve
> *code style refactoring
>
> Link for V1:
> * https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fpatchwork%2Fpatch%2F1226587%2F&amp;data=02%7C01%7Cchristian.koenig%40amd.com%7C50bb3a13f28b4e5d787508d7e59d9903%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637230337359422169&amp;sdata=LXUJgHOxfwSpacdW6suiI00z8egbRC3z3za0H3XtNV4%3D&amp;reserved=0
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 16 +++++++++-------
>   1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index 9dff792c9290..a64eeb07bec4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -660,13 +660,15 @@ static int reserve_bo_and_vm(struct kgd_mem *mem,
>   
>   	ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list,
>   				     false, &ctx->duplicates);
> -	if (!ret)
> -		ctx->reserved = true;
> -	else {
> +
> +	if (ret) {
>   		pr_err("Failed to reserve buffers in ttm\n");
>   		kfree(ctx->vm_pd);
>   		ctx->vm_pd = NULL;
>   	}
> +	else {
> +		ctx->reserved = true;
> +	}
>   
>   	return ret;
>   }
> @@ -733,15 +735,15 @@ static int reserve_bo_and_cond_vms(struct kgd_mem *mem,
>   
>   	ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list,
>   				     false, &ctx->duplicates);
> -	if (!ret)
> -		ctx->reserved = true;
> -	else
> -		pr_err("Failed to reserve buffers in ttm.\n");
>   
>   	if (ret) {
> +		pr_err("Failed to reserve buffers in ttm.\n");
>   		kfree(ctx->vm_pd);
>   		ctx->vm_pd = NULL;
>   	}
> +	else {

Please use "} else {" here.

Christian.

> +		ctx->reserved = true;
> +	}
>   
>   	return ret;
>   }