linux-kernel - Re: [PATCH 1/5] arm-cci: Rearrange code for splitting PMU vs driver code

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Date:	Tue, 03 Mar 2015 15:35:18 +0000
From:	Sudeep Holla <sudeep.holla@....com>
To:	"Suzuki K. Poulose" <suzuki.poulose@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
CC:	Sudeep Holla <sudeep.holla@....com>,
	"nico@...aro.org" <nico@...aro.org>,
	"b.zolnierkie@...sung.com" <b.zolnierkie@...sung.com>,
	"kgene@...nel.org" <kgene@...nel.org>,
	"a.kesavan@...sung.com" <a.kesavan@...sung.com>,
	"arnd@...db.de" <arnd@...db.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Pawel Moll <Pawel.Moll@....com>,
	"olof@...om.net" <olof@...om.net>,
	Punit Agrawal <Punit.Agrawal@....com>,
	Will Deacon <Will.Deacon@....com>,
	Catalin Marinas <Catalin.Marinas@....com>
Subject: Re: [PATCH 1/5] arm-cci: Rearrange code for splitting PMU vs driver
 code



On 02/03/15 11:29, Suzuki K. Poulose wrote:
> From: "Suzuki K. Poulose" <suzuki.poulose@....com>
>
> No functional changes, only code re-arrangements for easier split of the
> PMU code vs low level driver code. Extracts the port handling code
> to cci_probe_ports().
>
> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@....com>
> ---
>   drivers/bus/arm-cci.c |  330 +++++++++++++++++++++++++------------------------
>   1 file changed, 168 insertions(+), 162 deletions(-)
>
> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> index 84fd660..f27cf56 100644
> --- a/drivers/bus/arm-cci.c
> +++ b/drivers/bus/arm-cci.c

[...]

> @@ -1395,11 +1412,36 @@ static int cci_probe(void)
>   	sync_cache_w(&cpu_port);
>   	__sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports);
>   	pr_info("ARM CCI driver probed\n");
> +
>   	return 0;
> +}
> +
> +static int cci_probe(void)
> +{
> +	int ret;
> +	struct device_node *np;
> +	struct resource res;
> +
> +	np = of_find_matching_node(NULL, arm_cci_matches);
> +	if (!np)
> +		return -ENODEV;
>
> -memalloc_err:
> +	if (!of_device_is_available(np))
> +		return -ENODEV;
> +
> +	ret = of_address_to_resource(np, 0, &res);
> +	if (!ret) {
> +		cci_ctrl_base = ioremap(res.start, resource_size(&res));
> +		cci_ctrl_phys =	res.start;
> +	}
> +	if (ret || !cci_ctrl_base) {
> +		WARN(1, "unable to ioremap CCI ctrl\n");
> +		ret = -ENXIO;
> +		goto out;

IMO you can return directly here and get rid of this goto as nothing is
done there.

Regards,
Sudeep

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