linux-kernel - Re: [PATCH v2 05/20] media: venus: pm

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Message-ID: <5e0656ac-badf-dd37-b598-8e4a6f23d2c2@quicinc.com>
Date: Mon, 4 Mar 2024 11:10:52 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
        Stanimir Varbanov
	<stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Andy Gross
	<agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Mauro Carvalho
 Chehab" <mchehab@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC: Marijn Suijten <marijn.suijten@...ainline.org>,
        Stanimir Varbanov
	<stanimir.varbanov@...aro.org>,
        Mauro Carvalho Chehab
	<mchehab+huawei@...nel.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 05/20] media: venus: pm_helpers: Kill dead code



On 2/10/2024 2:39 AM, Konrad Dybcio wrote:
> A situation like:
> 
> if (!foo)
> 	goto bar;
> 
> for (i = 0; i < foo; i++)
> 	...1...
> 
> bar:
> 	...2...
> 
> is totally identical to:
> 
> for (i = 0; i < 0; i++) // === if (0)
> 	...1...
> 
> ...2...
> 
> Get rid of such boilerplate.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/pm_helpers.c | 10 ----------
>  1 file changed, 10 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
> index 1ba65345a5e2..7193075e8c04 100644
> --- a/drivers/media/platform/qcom/venus/pm_helpers.c
> +++ b/drivers/media/platform/qcom/venus/pm_helpers.c
> @@ -878,14 +878,10 @@ static int vcodec_domains_get(struct venus_core *core)
>  		.pd_flags = PD_FLAG_NO_DEV_LINK,
>  	};
>  
> -	if (!res->vcodec_pmdomains_num)
> -		goto skip_pmdomains;
> -
Removing the if check and relying only on for loop is good.
but I don't see the for loop here.
>  	ret = dev_pm_domain_attach_list(dev, &vcodec_data, &core->pmdomains);
>  	if (ret < 0)
>  		return ret;
>  
Also, what's the base of this change? I don't see above API in the code
anywhere.
> -skip_pmdomains:
>  	if (!core->res->opp_pmdomain)
>  		return 0;
>  
> @@ -928,9 +924,6 @@ static int core_resets_reset(struct venus_core *core)
>  	unsigned int i;
>  	int ret;
>  
> -	if (!res->resets_num)
> -		return 0;
> -
>  	for (i = 0; i < res->resets_num; i++) {
>  		ret = reset_control_assert(core->resets[i]);
>  		if (ret)
> @@ -953,9 +946,6 @@ static int core_resets_get(struct venus_core *core)
>  	unsigned int i;
>  	int ret;
>  
> -	if (!res->resets_num)
> -		return 0;
> -
>  	for (i = 0; i < res->resets_num; i++) {
>  		core->resets[i] =
>  			devm_reset_control_get_exclusive(dev, res->resets[i]);
>