linux-kernel - Re: [PATCH 10/10] fpga: fpga-mgr: altera-pr-ip: Simplify registration

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Message-ID: <a49b1d7c-9756-1059-f7a1-25dae460d659@redhat.com>
Date:   Sun, 4 Oct 2020 11:47:26 -0700
From:   Tom Rix <trix@...hat.com>
To:     Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org
Cc:     hao.wu@...el.com, michal.simek@...inx.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        russell.h.weight@...el.com, matthew.gerlach@...el.com
Subject: Re: [PATCH 10/10] fpga: fpga-mgr: altera-pr-ip: Simplify registration


On 10/3/20 10:14 PM, Moritz Fischer wrote:
> Simplify registration using new devm_fpga_mgr_register() API.
> Remove the now obsolete altera_pr_unregister() function.
>
> Signed-off-by: Moritz Fischer <mdf@...nel.org>
> ---
>
> We should take another look at this, IIRC correctly the point of
> splitting this up into a separate driver was to make it useable by a
> different (pci?) driver later on.
>
> It doesn't seem like this happened, and I think we should just make this
> a platform driver?
>
> ---
>  drivers/fpga/altera-pr-ip-core-plat.c  | 10 ----------
>  drivers/fpga/altera-pr-ip-core.c       | 14 +-------------
>  include/linux/fpga/altera-pr-ip-core.h |  1 -
>  3 files changed, 1 insertion(+), 24 deletions(-)
>
> diff --git a/drivers/fpga/altera-pr-ip-core-plat.c b/drivers/fpga/altera-pr-ip-core-plat.c
> index 99b9cc0e70f0..b008a6b8d2d3 100644
> --- a/drivers/fpga/altera-pr-ip-core-plat.c
> +++ b/drivers/fpga/altera-pr-ip-core-plat.c
> @@ -28,15 +28,6 @@ static int alt_pr_platform_probe(struct platform_device *pdev)
>  	return alt_pr_register(dev, reg_base);
>  }
>  
> -static int alt_pr_platform_remove(struct platform_device *pdev)
> -{
> -	struct device *dev = &pdev->dev;
> -
> -	alt_pr_unregister(dev);
> -
> -	return 0;
> -}
> -
>  static const struct of_device_id alt_pr_of_match[] = {
>  	{ .compatible = "altr,a10-pr-ip", },
>  	{},
> @@ -46,7 +37,6 @@ MODULE_DEVICE_TABLE(of, alt_pr_of_match);
>  
>  static struct platform_driver alt_pr_platform_driver = {
>  	.probe = alt_pr_platform_probe,
> -	.remove = alt_pr_platform_remove,
>  	.driver = {
>  		.name	= "alt_a10_pr_ip",
>  		.of_match_table = alt_pr_of_match,
> diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c
> index 2cf25fd5e897..dfdf21ed34c4 100644
> --- a/drivers/fpga/altera-pr-ip-core.c
> +++ b/drivers/fpga/altera-pr-ip-core.c
> @@ -195,22 +195,10 @@ int alt_pr_register(struct device *dev, void __iomem *reg_base)
>  	if (!mgr)
>  		return -ENOMEM;
>  
> -	dev_set_drvdata(dev, mgr);
> -
> -	return fpga_mgr_register(mgr);
> +	return devm_fpga_mgr_register(dev, mgr);
>  }
>  EXPORT_SYMBOL_GPL(alt_pr_register);
>  
> -void alt_pr_unregister(struct device *dev)
> -{
> -	struct fpga_manager *mgr = dev_get_drvdata(dev);
> -
> -	dev_dbg(dev, "%s\n", __func__);
> -
> -	fpga_mgr_unregister(mgr);
> -}
> -EXPORT_SYMBOL_GPL(alt_pr_unregister);

Similar to the others, except for removing this symbol.

A patch should do one logical thing.

I'd rather this be split out of the patchset.

Tom

> -
>  MODULE_AUTHOR("Matthew Gerlach <matthew.gerlach@...ux.intel.com>");
>  MODULE_DESCRIPTION("Altera Partial Reconfiguration IP Core");
>  MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/fpga/altera-pr-ip-core.h b/include/linux/fpga/altera-pr-ip-core.h
> index 0b08ac20ab16..a6b4c07858cc 100644
> --- a/include/linux/fpga/altera-pr-ip-core.h
> +++ b/include/linux/fpga/altera-pr-ip-core.h
> @@ -13,6 +13,5 @@
>  #include <linux/io.h>
>  
>  int alt_pr_register(struct device *dev, void __iomem *reg_base);
> -void alt_pr_unregister(struct device *dev);
>  
>  #endif /* _ALT_PR_IP_CORE_H */