linux-kernel - Re: [PATCH][PCI]: Introduce pci_find_capability

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Message-ID: <20080515171003.GF14846@ghostprotocols.net>
Date:	Thu, 15 May 2008 14:10:03 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-rt-users@...r.kernel.org
Subject: Re: [PATCH][PCI]: Introduce pci_find_capability_cached and make
	MSI use it

Em Thu, May 15, 2008 at 11:04:07AM -0600, Matthew Wilcox escreveu:
> On Thu, May 15, 2008 at 01:04:26PM -0300, Arnaldo Carvalho de Melo wrote:
> > 	So I implemented pci_find_capability_cached and made MSI use it
> > for good measure, please consider applying.
> 
> As I told you on IRC, this is just the MSI code being complete crap.
> It should be caching the offset itself.  We shouldn't have this extra
> array in the struct pci_dev just because MSI is broken.

Well, we can certainly do that, its just that I did this first and
thought that perhaps there could be some other users, but I see that 44
extra bytes per pci_dev can be a pain if the only one to reap benefits
is MSI, can't you think of any other users? I couldn't detect any so far
in my admitedly limited testing.

- Arnaldo
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