linux-kernel - Re: Possible issue with dangling PCI BARs

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Message-Id: <1197544820.15741.137.camel@pasglop>
Date:	Thu, 13 Dec 2007 22:20:20 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Robert Hancock <hancockr@...w.ca>,
	linux-pci@...ey.karlin.mff.cuni.cz,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Possible issue with dangling PCI BARs


> > Supporting pci_enable_device_io / pci_enable_device_mmio / pci_iomap_io /
> > pci_iomap_mmio seems to cover pretty much all the use cases we have. 
> > 
> > The users we have right now that are:
> > 
> >         - pata_cs5520   (can be dealt with easily)
> >         - old IDE       (with the new resource handling for legacy IDE
> > can use pci_enable_device_io I think, ditto pci/cs5520)
> >         - scx200_acb    (looks like a simple substitution works)
> >         - lpfc          pci_enable_device_mmio
> >         - qla2xxx       pci_enable_device ? (enables IO and MMIO)

I may have not fully undestood you in my previous reply. You are proposing
replacing pci_enable_device_bars() with a pair of pci_enable_device_io/mem ?

I think that would be a good idea indeed.

Cheers,
Ben.


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