Re: [PATCH] add transport class symlink to device object

[Greg KH]

On Thu, Aug 18, 2005 at 07:30:50AM +0100, Russell King wrote:
> On Wed, Aug 17, 2005 at 10:21:56PM -0700, Greg KH wrote:
> > On Mon, Aug 15, 2005 at 09:32:44AM +0100, Russell King wrote:
> > > On Mon, Aug 15, 2005 at 01:43:03AM +0100, Matthew Wilcox wrote:
> > > > On Sun, Aug 14, 2005 at 11:25:25PM +0100, Russell King wrote:
> > > > > Eww.  Do you really want one struct device per tty with all the
> > > > > memory each one eats?
> > > > > 
> > > > > If that's really what you want you need to talk to Alan and not me.
> > > > > Alan looks after tty level stuff, I look after serial level stuff.
> > > > > The above is a tty level issue not a serial level issue.
> > > > 
> > > > mmm.  I don't know whether it's really a tty level issue or a serial
> > > > issue.  The only tty classes with corresponding devices are the serial
> > > > ones, at least on my system.  If this is the case, then the right fix
> > > > would seem to be something like creating a new struct device for each
> > > > serial port, then making that the uart_port->dev instead of the pci_dev
> > > > or whatever.
> > > 
> > > What's the reason for enforcing one struct device per struct class_dev ?
> > > I thought one of the points of class_dev was that you could have multiple
> > > of them per struct device.
> > 
> > No such enforcement is needed at all, and not encouraged.
> 
> The complaint is that serial is registering several different class_devs
> for the same class and device.

That's because they are unique class devices, right?  I don't see a
problem here at all.

> So that's precisely what is being done by adding the symlink as per this
> sub-thread.

Ok, I think I'm just confused and I'll drop this now :)

thanks,

greg k-h
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