linux-kernel - Re: [PATCH RFC 3/5] pci: add pci_iomap

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Date:	Fri, 12 Dec 2014 01:49:36 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org,
	cornelia.huck@...ibm.com, linux-arch@...r.kernel.org
Subject: Re: [PATCH RFC 3/5] pci: add pci_iomap_range

On Thu, Dec 11, 2014 at 11:27:54PM +0100, Arnd Bergmann wrote:
> On Thursday 11 December 2014 21:37:34 Michael S. Tsirkin wrote:
> >         if (flags & IORESOURCE_MEM) {
> > -               if (flags & IORESOURCE_CACHEABLE)
> > +               if (!force_nocache && (flags & IORESOURCE_CACHEABLE))
> >                         return ioremap(start, len);
> >                 return ioremap_nocache(start, len);
> >         }
> > 
> 
> ioremap is the same as ioremap_nocache, so this doesn't really make any
> sense. IORESOURCE_CACHEABLE is practically only set for ROM bars, which
> we rarely map.
> 
> 	Arnd

Hmm I think you are right.
It's an old patch - I think at one point in time we did set it when we
now set IORESOURCE_PREFETCH.
I'll drop this parameter.

-- 
MST
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