linux-kernel - Re: [PATCH v2 2/3] firmware: qcom: scm: Remove core, iface and bus clocks dependency

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

Date:   Wed, 9 Nov 2016 21:55:07 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Sarangdhar Joshi <spjoshi@...eaurora.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Trilok Soni <tsoni@...eaurora.org>
Subject: Re: [PATCH v2 2/3] firmware: qcom: scm: Remove core, iface and bus
 clocks dependency

On Wed 09 Nov 17:47 PST 2016, Stephen Boyd wrote:

> On 11/03, Sarangdhar Joshi wrote:
> > diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> > index d79fecd..844e90d 100644
> > --- a/drivers/firmware/qcom_scm.c
> > +++ b/drivers/firmware/qcom_scm.c
> > @@ -380,32 +384,40 @@ EXPORT_SYMBOL(qcom_scm_is_available);
> >  static int qcom_scm_probe(struct platform_device *pdev)
> >  {
> >  	struct qcom_scm *scm;
> > +	uint32_t clks;
> 
> If this was unsigned long flags;
> 

I did look at this too and could only find a mixture of ways people have
done this. Isn't the correct type for this intptr_t?

Regards,
Bjorn

> >  	int ret;
> >  
> >  	scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL);
> >  	if (!scm)
> >  		return -ENOMEM;
> >  
> > -	scm->core_clk = devm_clk_get(&pdev->dev, "core");
> > -	if (IS_ERR(scm->core_clk)) {
> > -		if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
> > -			return PTR_ERR(scm->core_clk);
> > +	clks = (uint32_t)((uintptr_t)of_device_get_match_data(&pdev->dev));
> 
> then this could just be a cast to unsigned long?
> 
> > +	if (clks & SCM_HAS_CORE_CLK) {
> > +		scm->core_clk = devm_clk_get(&pdev->dev, "core");
> > +		if (IS_ERR(scm->core_clk)) {
> > +			if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
> > +				return PTR_ERR(scm->core_clk);
> >  
> > -		scm->core_clk = NULL;
> > +			scm->core_clk = NULL;
> > +		}
> >  	}
> 
> -- 
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> a Linux Foundation Collaborative Project