linux-kernel - Re: [PATCH v2 2/2] clk: mediatek: Add MT8173 MMPLL change rate support

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]

Message-ID: <559DC44A.1030900@codeaurora.org>
Date:	Wed, 08 Jul 2015 17:46:02 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	James Liao <jamesjj.liao@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Mike Turquette <mturquette@...libre.com>,
	Heiko Stubner <heiko@...ech.de>
CC:	srv_heupstream@...iatek.com, Daniel Kurtz <djkurtz@...omium.org>,
	Ricky Liang <jcliang@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2 2/2] clk: mediatek: Add MT8173 MMPLL change rate support

On 07/08/2015 01:37 AM, James Liao wrote:
> diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
> index 68af518..622e7b6 100644
> --- a/drivers/clk/mediatek/clk-pll.c
> +++ b/drivers/clk/mediatek/clk-pll.c
> @@ -138,16 +138,28 @@ static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
>  		u32 freq, u32 fin)
>  {
>  	unsigned long fmin = 1000 * MHZ;
> +	const struct mtk_pll_div_table *div_table = pll->data->div_table;
>  	u64 _pcw;
>  	u32 val;
>  
>  	if (freq > pll->data->fmax)
>  		freq = pll->data->fmax;
>  
> -	for (val = 0; val < 4; val++) {
> +	if (div_table) {
> +		if (freq > div_table[0].freq)
> +			freq = div_table[0].freq;
> +
> +		for (val = 0; div_table[val + 1].freq != 0; val++) {
> +			if (freq > div_table[val + 1].freq)
> +				break;
> +		}
>  		*postdiv = 1 << val;
> -		if (freq * *postdiv >= fmin)
> -			break;
> +	} else {
> +		for (val = 0; val < 5; val++) {
> +			*postdiv = 1 << val;
> +			if ((u64)freq * *postdiv >= fmin)
>

No mention of this cast in the commit text. Is this fixing a bug? If so,
please mention it and/or split this bug fix off of this patch.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/