linux-kernel - Re: [PATCH linux-next] drm/i915: Remove the unneeded result variables

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <878rn1dd8l.fsf@intel.com>
Date:   Fri, 02 Sep 2022 18:09:46 +0300
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     cgel.zte@...il.com, joonas.lahtinen@...ux.intel.com
Cc:     tvrtko.ursulin@...ux.intel.com, airlied@...ux.ie,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, rodrigo.vivi@...el.com,
        Zeal Robot <zealci@....com.cn>,
        zhang songyi <zhang.songyi@....com.cn>
Subject: Re: [PATCH linux-next] drm/i915: Remove the unneeded result variables

On Fri, 02 Sep 2022, Jani Nikula <jani.nikula@...ux.intel.com> wrote:
> On Fri, 02 Sep 2022, cgel.zte@...il.com wrote:
>> From: zhang songyi <zhang.songyi@....com.cn>
>>
>> Return the mul_u32_fixed16() and div_fixed16() directly instead of
>>  redundant variables.
>>
>> Reported-by: Zeal Robot <zealci@....com.cn>
>> Signed-off-by: zhang songyi <zhang.songyi@....com.cn>
>
> NAK.

And to explain this rude reply to our friendly community:

There's never *any* response to my review comments from
cgel.zte@...il.com, so I can't be bothered to write anything more than
just "NAK".


>
>
> BR,
> Jani.
>
>
>> ---
>>  drivers/gpu/drm/i915/intel_pm.c | 9 +++------
>>  1 file changed, 3 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
>> index 210c1f78cc90..a6757ed9081a 100644
>> --- a/drivers/gpu/drm/i915/intel_pm.c
>> +++ b/drivers/gpu/drm/i915/intel_pm.c
>> @@ -5272,7 +5272,6 @@ skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
>>  	       uint_fixed_16_16_t plane_blocks_per_line)
>>  {
>>  	u32 wm_intermediate_val;
>> -	uint_fixed_16_16_t ret;
>>  
>>  	if (latency == 0)
>>  		return FP_16_16_MAX;
>> @@ -5280,8 +5279,8 @@ skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
>>  	wm_intermediate_val = latency * pixel_rate;
>>  	wm_intermediate_val = DIV_ROUND_UP(wm_intermediate_val,
>>  					   pipe_htotal * 1000);
>> -	ret = mul_u32_fixed16(wm_intermediate_val, plane_blocks_per_line);
>> -	return ret;
>> +
>> +	return mul_u32_fixed16(wm_intermediate_val, plane_blocks_per_line);
>>  }
>>  
>>  static uint_fixed_16_16_t
>> @@ -5290,7 +5289,6 @@ intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
>>  	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
>>  	u32 pixel_rate;
>>  	u32 crtc_htotal;
>> -	uint_fixed_16_16_t linetime_us;
>>  
>>  	if (!crtc_state->hw.active)
>>  		return u32_to_fixed16(0);
>> @@ -5301,9 +5299,8 @@ intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
>>  		return u32_to_fixed16(0);
>>  
>>  	crtc_htotal = crtc_state->hw.pipe_mode.crtc_htotal;
>> -	linetime_us = div_fixed16(crtc_htotal * 1000, pixel_rate);
>>  
>> -	return linetime_us;
>> +	return div_fixed16(crtc_htotal * 1000, pixel_rate);
>>  }
>>  
>>  static int

-- 
Jani Nikula, Intel Open Source Graphics Center