linux-kernel - Re: [PATCH] ssb: Fix DMA-API compilation for non-PCI systems

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Message-Id: <200811062223.09400.mb@bu3sch.de>
Date:	Thu, 6 Nov 2008 22:23:09 +0100
From:	Michael Buesch <mb@...sch.de>
To:	"Mike Frysinger" <vapier.adi@...il.com>
Cc:	"John Linville" <linville@...driver.com>,
	"Mike Frysinger" <vapier@...too.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ssb: Fix DMA-API compilation for non-PCI systems

On Thursday 06 November 2008 22:16:00 Mike Frysinger wrote:
> On Thu, Nov 6, 2008 at 15:49, Michael Buesch wrote:
> > --- wireless-testing.orig/include/linux/ssb/ssb.h       2008-08-01 17:26:05.000000000 +0200
> > +++ wireless-testing/include/linux/ssb/ssb.h    2008-11-06 21:45:37.000000000 +0100
> > @@ -427,12 +427,16 @@ static inline int ssb_dma_mapping_error(
> >  {
> >        switch (dev->bus->bustype) {
> >        case SSB_BUSTYPE_PCI:
> > +#ifdef CONFIG_SSB_PCIHOST
> >                return pci_dma_mapping_error(dev->bus->host_pci, addr);
> > +#endif
> > +               break;
> >        case SSB_BUSTYPE_SSB:
> >                return dma_mapping_error(dev->dev, addr);
> >        default:
> > -               __ssb_dma_not_implemented(dev);
> > +               break;
> >        }
> 
> all these functions now read:
> default: break;
> seems kind of pointless ... why not just drop that case completely

Because the compiler complains "not handled all cases...".
And yes, we do want to trigger __ssb_dma_not_implemented() for
these cases.

-- 
Greetings Michael.
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