linux-kernel - Re: [PATCH v2 06/13] PCI: cpqphp: stop managing hotplug

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Message-ID: <20080923012015.GD1814@ldl.fc.hp.com>
Date:	Mon, 22 Sep 2008 19:20:15 -0600
From:	Alex Chiang <achiang@...com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	jbarnes@...tuousgeek.org, kristen.c.accardi@...el.com
Subject: Re: [PATCH v2 06/13] PCI: cpqphp: stop managing hotplug_slot->name

* Matthew Wilcox <matthew@....cx>:
> On Tue, Sep 09, 2008 at 04:00:32AM -0600, Alex Chiang wrote:
> > -static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
> > -{
> > -	snprintf(buffer, buffer_size, "%d", slot->number);
> > -}
> 
> > +
> > +		scnprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
> 
> So ... we're using %d here and %u in acpiphp.  Obviously we don't expect
> to get a number above 2 billion, but I think if we do have some utterly
> bogus firmware that gives us a number above 2 billion, printing a
> positive number is a better user experience than a negative number.

Well, on some HP machines, a slot number >2 billion actually does
make sense, if you convert it to hex, and then consider that to
be some sort of encoding for topology.

But your point here stands, I can change this driver to a %u.

> We clearly have a common pattern here where hotplug drivers have a
> number insteaqd of a name (I would venture this is the most common).
> Maybe we need a common helper?  I think this is a subject for the
> long-term todo list, not something that needs to be addressed in the
> context of this patch series.

Yeah, ok -- long term todo. ;)

/ac

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