Re: [PATCH] add legacy resources to sysfs

From: Benjamin Herrenschmidt
Date: Wed Dec 22 2004 - 03:42:01 EST

On Tue, 2004-12-21 at 13:46 -0800, Greg KH wrote:
> On Tue, Dec 21, 2004 at 12:47:44PM -0800, Jesse Barnes wrote:
> > Here's a rediff against Greg's current tree. It adds legacy_io and legacy_mem
> > files to each PCI bus directory in sysfs for use by applications that want to
> > do old school ISA style programming from userspace.
> >
> > I'm not sure I've got the sysfs file creation correct, Greg? Am I passing the
> > wrong thing around? The compile warnings in pci-sysfs.c for the new routines
> > seem to indicate that... Basically I need to get to a pci_bus structure from
> > the read/write/mmap routines, and that should be accessible from the kobject
> > somewhere, right?
> You are passing the wrong things around :)
> A struct pci_bus is a struct class_device, not a struct device. I think
> you need to rethink your goal of putting the files into the pci device
> directory, or just put the files into the proper /sys/class/pci_bus/*
> directory as your code assumes is happening.

It makes no sense in /sys/class/pci_bus/* since we need the files to be
in a bus _instance_


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