linux-kernel - Re: [PATCH v3 2/2] pinctrl: samsung: support a bus clock

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: Thu, 2 May 2024 08:41:06 +0100
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: André Draszik <andre.draszik@...aro.org>,
 Krzysztof Kozlowski <krzk@...nel.org>,
 Sylwester Nawrocki <s.nawrocki@...sung.com>,
 Alim Akhtar <alim.akhtar@...sung.com>,
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Tomasz Figa <tomasz.figa@...il.com>,
 Peter Griffin <peter.griffin@...aro.org>
Cc: Will McVicker <willmcvicker@...gle.com>,
 Sam Protsenko <semen.protsenko@...aro.org>, kernel-team@...roid.com,
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] pinctrl: samsung: support a bus clock

Hi, André!

On 4/26/24 14:25, André Draszik wrote:
> @@ -200,6 +235,14 @@ static int exynos_irq_request_resources(struct irq_data *irqd)
>  	shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
>  	mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
>  
> +	ret = clk_enable(bank->drvdata->pclk);
> +	if (ret) {
> +		dev_err(bank->gpio_chip.parent,
> +			"unable to enable clock for configuring pin %s-%lu\n",
> +			bank->name, irqd->hwirq);
> +		return ret;

here we return an error
> +	}
> +
>  	raw_spin_lock_irqsave(&bank->slock, flags);
>  
>  	con = readl(bank->pctl_base + reg_con);
> @@ -209,6 +252,8 @@ static int exynos_irq_request_resources(struct irq_data *irqd)
>  
>  	raw_spin_unlock_irqrestore(&bank->slock, flags);
>  
> +	clk_disable(bank->drvdata->pclk);
> +
>  	return 0;
>  }
>  
> @@ -223,6 +268,13 @@ static void exynos_irq_release_resources(struct irq_data *irqd)
>  	shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
>  	mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
>  
> +	if (clk_enable(bank->drvdata->pclk)) {
> +		dev_err(bank->gpio_chip.parent,
> +			"unable to enable clock for deconfiguring pin %s-%lu\n",
> +			bank->name, irqd->hwirq);
> +		return;

but here we just print an error. I guess that for consistency reasons it
would be good to follow up with a patch and change the return types of
these methods and return the error too when the clock enable fails.

Cheers,
ta