linux-kernel - Re: [PATCH 1/9] pci: add pci_bridge_release_unused_res and pci_bus_release_unused_bridge

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Message-ID: <20100121181859.GC17684@ldl.fc.hp.com>
Date:	Thu, 21 Jan 2010 11:18:59 -0700
From:	Alex Chiang <achiang@...com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 1/9] pci: add pci_bridge_release_unused_res and
	pci_bus_release_unused_bridge_res

  
Sorry, this is getting into bike-shed territory.

I'm a lot happier with the code now, so may as well fix up a few
style issues before it goes in.

> +static void pci_bridge_release_resources(struct pci_bus *bus,
> +					  unsigned long type)
> +{

[...]

> +	if (changed) {
> +		if (type & IORESOURCE_PREFETCH) {
> +			/* avoiding touch the one without PREF */
> +			type = IORESOURCE_PREFETCH;
> +		}

Strictly speaking, you don't need those curly braces. If you want
readability, how about moving the comment up?

		/* Only setup prefetch resources */
		if (type & IORESOURCE_PREFETCH)
			type = IORESOURCE_PREFETCH;


> +		__pci_setup_bridge(bus, type);
> +	}
> +}
> +
> +static void __ref pci_bus_release_bridge_resources(struct pci_bus *bus,
> +						   unsigned long type,
> +						   enum release_type rel_type)
> +{

[...]

> +
> +	/* The root bus? */

Useless comment.

> +	if (pci_is_root_bus(bus))
> +		return;
> +
> +	if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI)
> +		return;
> +
> +	if (((rel_type == leaf_only) && is_leaf_bridge) ||
> +		    (rel_type == whole_subtree))
> +		pci_bridge_release_resources(bus, type);
> +}

Can clean this up a bit too with short-circuit logic.

	if ((rel_type == whole_subtree) || is_leaf_bridge)
		pci_bridge_release_resources(bus, type);

If you clean those up, you can add my:

Reviewed-by: Alex Chiang <achiang@...com>

> +
>  static void pci_bus_dump_res(struct pci_bus *bus)
>  {
>          int i;
> -- 
> 1.6.4.2
> 
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