linux-kernel - Re: [PATCH] drm/radeon:WARNING opportunity for max()

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Date:   Tue, 16 Nov 2021 08:22:58 +0100
From:   Christian König <christian.koenig@....com>
To:     zhaoxiao <zhaoxiao@...ontech.com>, airlied@...ux.ie,
        daniel@...ll.ch
Cc:     alexander.deucher@....com, Xinhui.Pan@....com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/radeon:WARNING opportunity for max()

Am 16.11.21 um 06:50 schrieb zhaoxiao:
> Fix following coccicheck warning:
> drivers/gpu/drm/radeon/r100.c:3450:26-27: WARNING opportunity for max()
> drivers/gpu/drm/radeon/r100.c:2812:23-24: WARNING opportunity for max()
>
> Signed-off-by: zhaoxiao <zhaoxiao@...ontech.com>

In general feel free to add my Acked-by, but I'm not sure if we want 
such cleanups in a driver which is only in maintenance mode.

If you do this as part of a general and automated cleanup then it is 
probably ok.

Regards,
Christian.

> ---
>   drivers/gpu/drm/radeon/r100.c | 10 ++--------
>   1 file changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
> index 2dd85ba1faa2..c65ee6f44af2 100644
> --- a/drivers/gpu/drm/radeon/r100.c
> +++ b/drivers/gpu/drm/radeon/r100.c
> @@ -2809,10 +2809,7 @@ void r100_vram_init_sizes(struct radeon_device *rdev)
>   		if (rdev->mc.aper_size > config_aper_size)
>   			config_aper_size = rdev->mc.aper_size;
>   
> -		if (config_aper_size > rdev->mc.real_vram_size)
> -			rdev->mc.mc_vram_size = config_aper_size;
> -		else
> -			rdev->mc.mc_vram_size = rdev->mc.real_vram_size;
> +		rdev->mc.mc_vram_size = max(config_aper_size, rdev->mc.real_vram_size);
>   	}
>   }
>   
> @@ -3447,10 +3444,7 @@ void r100_bandwidth_update(struct radeon_device *rdev)
>   	mc_latency_mclk.full += disp_latency_overhead.full + cur_latency_mclk.full;
>   	mc_latency_sclk.full += disp_latency_overhead.full + cur_latency_sclk.full;
>   
> -	if (mc_latency_mclk.full > mc_latency_sclk.full)
> -		disp_latency.full = mc_latency_mclk.full;
> -	else
> -		disp_latency.full = mc_latency_sclk.full;
> +	disp_latency.full = max(mc_latency_mclk.full, mc_latency_sclk.full);
>   
>   	/* setup Max GRPH_STOP_REQ default value */
>   	if (ASIC_IS_RV100(rdev))