linux-kernel - Re: [PATCH 4/9] block: mtip32xx: Replace deprecated PCI functions

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Message-ID: <ZsOJONEA2x93bSpO@smile.fi.intel.com>
Date: Mon, 19 Aug 2024 21:04:40 +0300
From: Andy Shevchenko <andy@...nel.org>
To: Philipp Stanner <pstanner@...hat.com>
Cc: onathan Corbet <corbet@....net>, Jens Axboe <axboe@...nel.dk>,
	Wu Hao <hao.wu@...el.com>, Tom Rix <trix@...hat.com>,
	Moritz Fischer <mdf@...nel.org>, Xu Yilun <yilun.xu@...el.com>,
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	Bartosz Golaszewski <brgl@...ev.pl>,
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Subject: Re: [PATCH 4/9] block: mtip32xx: Replace deprecated PCI functions

On Mon, Aug 19, 2024 at 06:51:44PM +0200, Philipp Stanner wrote:
> pcim_iomap_regions() and pcim_iomap_table() have been deprecated by the
> PCI subsystem in commit e354bb84a4c1 ("PCI: Deprecate
> pcim_iomap_table(), pcim_iomap_regions_request_all()").
> 
> In mtip32xx, these functions can easily be replaced by their respective
> successors, pcim_request_region() and pcim_iomap(). Moreover, the
> driver's call to pcim_iounmap_regions() is not necessary, because it's
> invoked in the remove() function. Cleanup can, hence, be performed by
> PCI devres automatically.
> 
> Replace pcim_iomap_regions() and pcim_iomap_table().
> 
> Remove the call to pcim_iounmap_regions().

...

int mtip_pci_probe()

>  setmask_err:
> -	pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
> +	pcim_release_region(pdev, MTIP_ABAR);

But why?

...

mtip_pci_remove()

>  	pci_disable_msi(pdev);
>  
> -	pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);

This is okay.

...

>  	pci_set_drvdata(pdev, NULL);

Side note: This is done by driver core for the last 10+ years…

-- 
With Best Regards,
Andy Shevchenko