linux-kernel - Re: [PATCH v1 01/10] ipmi_si: Switch to use platform_get_mem_or

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Date:   Fri, 2 Apr 2021 08:57:56 -0500
From:   Corey Minyard <minyard@....org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Corey Minyard <cminyard@...sta.com>,
        openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 01/10] ipmi_si: Switch to use platform_get_mem_or_io()

On Tue, Mar 30, 2021 at 09:16:40PM +0300, Andy Shevchenko wrote:
> Switch to use new platform_get_mem_or_io() instead of home grown analogue.
> Note, we also introduce ipmi_set_addr_data_and_space() helper here.

You didn't send a part 0 that I saw, so just using this.  This is a nice
cleanup set, I just had a few very minor nits.  Thanks for this.

-corey

> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/char/ipmi/ipmi_si_platform.c | 40 +++++++++++-----------------
>  1 file changed, 16 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/char/ipmi/ipmi_si_platform.c b/drivers/char/ipmi/ipmi_si_platform.c
> index 129b5713f187..d7bd093f80e9 100644
> --- a/drivers/char/ipmi/ipmi_si_platform.c
> +++ b/drivers/char/ipmi/ipmi_si_platform.c
> @@ -100,35 +100,32 @@ static int acpi_gpe_irq_setup(struct si_sm_io *io)
>  }
>  #endif
>  
> +static void ipmi_set_addr_data_and_space(struct resource *r, struct si_sm_io *io)
> +{
> +	io->addr_data = r->start;
> +	if (resource_type(r) == IORESOURCE_IO)
> +		io->addr_space = IPMI_IO_ADDR_SPACE;
> +	else
> +		io->addr_space = IPMI_MEM_ADDR_SPACE;
> +}
> +
>  static struct resource *
>  ipmi_get_info_from_resources(struct platform_device *pdev,
>  			     struct si_sm_io *io)
>  {
> -	struct resource *res, *res_second;
> +	struct resource *res, *second;
>  
> -	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
> -	if (res) {
> -		io->addr_space = IPMI_IO_ADDR_SPACE;
> -	} else {
> -		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -		if (res)
> -			io->addr_space = IPMI_MEM_ADDR_SPACE;
> -	}
> +	res = platform_get_mem_or_io(pdev, 0);
>  	if (!res) {
>  		dev_err(&pdev->dev, "no I/O or memory address\n");
>  		return NULL;
>  	}
> -	io->addr_data = res->start;
> +	ipmi_set_addr_data_and_space(res, io);
>  
>  	io->regspacing = DEFAULT_REGSPACING;
> -	res_second = platform_get_resource(pdev,
> -			       (io->addr_space == IPMI_IO_ADDR_SPACE) ?
> -					IORESOURCE_IO : IORESOURCE_MEM,
> -			       1);
> -	if (res_second) {
> -		if (res_second->start > io->addr_data)
> -			io->regspacing = res_second->start - io->addr_data;
> -	}
> +	second = platform_get_mem_or_io(pdev, 1);
> +	if (second && resource_type(second) == resource_type(res) && second->start > io->addr_data)
> +		io->regspacing = second->start - io->addr_data;
>  
>  	return res;
>  }
> @@ -275,12 +272,7 @@ static int of_ipmi_probe(struct platform_device *pdev)
>  	io.addr_source	= SI_DEVICETREE;
>  	io.irq_setup	= ipmi_std_irq_setup;
>  
> -	if (resource.flags & IORESOURCE_IO)
> -		io.addr_space = IPMI_IO_ADDR_SPACE;
> -	else
> -		io.addr_space = IPMI_MEM_ADDR_SPACE;
> -
> -	io.addr_data	= resource.start;
> +	ipmi_set_addr_data_and_space(&resource, &io);
>  
>  	io.regsize	= regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
>  	io.regspacing	= regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
> -- 
> 2.30.2
>